"Magic: the Gathering" is as Hard as Arithmetic. "In this paper we show that the ``mate-in-$n$'' problem for Magic is $\Delta^0_n$-hard and that optimal play in two-player Magic is non-arithmetic in general." [abstract + link to PDF] arxiv.org/abs/2003.05119
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I have aspergers, very good at arithmetic, bad at following steps, going back to college to try and earn math degree, any advice appreciated

Iโ€™ve been thinking lately about what Iโ€™d get my bachelors in. I flunked out of college once when I had a math intensive major, skipped around from college to college until I got into a trade, and the employers in this trade do full tuition reimbursement usually. Anyhow, part of me has been dead ever since I failed so badly at math, despite giving it far above the normal amounts of efforts anyone else has. I could study three or four hours a night, three weeks in advance for a test, and get a 30% on the test. I have been afraid to care about anything since then, just because when I gave it my all, it simply wasnโ€™t anywhere close to enough. I think getting a math degree of all things, as a working adult, would be such a massive victory for me personally. Iโ€™d probably cry at graduation.

With this tuition reimbursement thing, Iโ€™m thinking of getting a degree in math. I just need to prove to myself that I can do it, because Iโ€™ve been afraid to try at anything so seriously since I failed so

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TIL complex mathematics does not appear until 3000 BC with ancient texts from Mesopotamia & Egypt appearing in 2000-1800 BC. The Pythagorean theorem seems to be the most ancient & widespread development in mathematics after basic arithmetic. en.wikipedia.org/wiki/Matโ€ฆ
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WCGW If i go and rob without basic arithmetic.
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Mara Gay, NY Times editorial board member who can't do third-grade arithmetic, writes about her experience being on the receiving end of cancel culture. She wasn't laughed at because she can't do math, but because we're racist. nytimes.com/2020/03/11/opโ€ฆ
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That combat arithmetic brings out the pressure.
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MENTAL ARITHMETIC TRAINING reddit.com/rpan/fdi4ci
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Infant school level arithmetic.

The proposition "there is at least one god" is either true or it is not true. So, there are two basic positions on the existence question about gods: 1. it is true that at least one god exists, 2. it is not true that at least one god exists. Notice that 2. is equivalent to it is true that no gods exist.

Agnosticism is not the position that neither of the above is correct, it is the position that it is impossible to adequately justify either position 1. or 2., thus we should not hold either position but instead remain neutral. This defines the third position about the existence question concerning gods.

In practice those who are undecided tend to call themselves agnostics, but being undecided is to not take a position, so this usage of "agnostic" is unsatisfactory, unless it is explicated. Anyway, for present purposes, what is important is that this kind of "agnostic" holds none of the other three positions.

So we have three basic positions: 1. at least one god exists

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Arithmetic, schmarithmetic
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In your own words (without looking it up), how would you describe a computer's Arithmetic Logic Unit's processing of numbers?
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Itโ€™s a simple arithmetic....
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Why Canโ€™t Liberals Do Arithmetic? I don't call democrats liberal anymore, since they're not, according to the classic definition. powerlineblog.com/archiveโ€ฆ
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The same arguments apply to the names given to the two numbers permitted by Boolean arithmetic. Because of the unfortunate connection with philosophy they are often denoted by the two words. ๐’•๐’“๐’–๐’† ๐’‡๐’‚๐’๐’”๐’† ro.uow.edu.au/cgi/viewconโ€ฆ
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I can't figure out what I've done wrong in my code to carry out date arithmetic

Hi, I have a homework assignment this week and I can't figure out what I've done wrong. We have to write a program to calculate a date either in the past or future with regards to a certain date (i.e. 20 days before today). I'm pretty sure the problem is in my calc_date function or my main function (both attached below), but can't figure out what it is. Can someone help please? Thanks in advance.

Here is main:

int main ()
{
int day, month, year, number_of_days, numdays, sign, number, period, daynum;
cout << "Enter a date in dd mm yyyy format: " << endl;
cin >> day >> month >> year;
number_of_days = daynumber(day, month, year);

cout << "This is day number " << number_of_days << endl << endl;
cout << "Enter the modification as the sign, value and period: " << endl;
cin >> sign >> number >> period;
daynum = calc_date(sign, period, number_of_days, number);
dayMthYr (da

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Also, he can do basic arithmetic!
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Is there performance difference between add and subtract (pointer arithmetic) on modern architectures?

On various modern day architectures (x64, arm aarch64 etc..) Is there a performance difference between

a) computing an address by adding an offset to base pointer

b) computing address by subtracting offset to base pointer

??

I am asking this because I don't know whether there are special instruction for pointer arithmetic, where addition is taken as common case and optimized.

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Arithmetic Sequence Sum

The sum of the odd indexed terms (a_1, a_3, a_5, ..., a_2n-1) of an integer arithmetic sequence is 133. The sum of the terms a_1, a_4, a_7,...,a_3n-2 of the same sequence is 95.

What is the sum of all terms of this sequence?

The answer is 247, but I have no idea why.

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Seemingly simple arithmetic problem I can't figure out

Excel rookie here:

I am working on a long-term budget proposal where I will be reporting a net loss each year for 5 years and want to balance my budget by withdrawing from two asset acounts I have available. I will withdraw from one account until it is empty and then move on to the next over the 5 years.

So in excel I want to subtract my net loss from 2 cells (where my asset account balances are recorded) but I want one to equal zero before it withdraws from the second.

I have a picture but suck at Reddit and can't figure out how to type a body of a post with a picture attached....hoping I can add a photo to the comments.

Edit: here's a link to a screenshot... hopefully it's accessible to the public

https://drive.google.com/file/d/1dUJjQSfiXw2sR-d5n8telnsnly2gfjqw/view?usp=drivesdk

Any help is appreciated! Thanks folks!

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Solving arithmetic in prolog recursively

Hey guys,

Im still a beginner in prolog and have been trying some practice problems. Im stumped on this question. I need to write a program to handle queries like this :

?- eval(add(2, mul(3, 4)), V).

So that is basically 2+(3*4) => V = 14

I'm not sure how I can handle these nested calls. Any help would be appreciated

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How I calculate approximate rune efficiency in just a couple of seconds, using basic arithmetic

** EDITS 2/1/2020 **

Thank you for the comments - even the negative ones, all feedback is helpful and useful! Two notes on the edit:

  1. Trying to shorten the post, I didn't explain CDMG well. The max is +7 of course, but I include it with +8 for reasons explained in comments added to the post.
  2. This post was intended as a precursor to the next post on how to identify a rune's potential (how good it can be after gems/grinds), which is something efficiency calculators and other available tools do not currently identify. I understand the system itself is not useful for many advanced players - but I've spoken with enough players to know it is useful to some, and that makes it worth posting for me :)

--------------------------------------------------------------------------------------------------------------------------------------------

Hey all, I've often been asked by guildies/friends/etc. which runes they should keep or sell, because their rune storage is at max but a lot th

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Found an arithmetic book from 1862 filled with doodles and rubbings of a Swedish coin.
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Are you good at mental arithmetic?

Hey, does anyone like to practise mental arithmetic? We used to have competitions in my school, which were kinda cool. I miss that experience.

I have created a free, little app for Android based on that model (with leaderboards, levels, etc.). I couldn't really find a good enough product on the store for this (only static, offline content). I would really appreciate some feedback. As the app is brand new, I need some competitors to chase๐Ÿ˜€. Thanks.

The app can be found on play store. Here's a direct link: Maths Adventures: Arithmetic is cool

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Do measurable sets of positive upper density contain arbitrarily long arithmetic progressions?

We say a measurable subset E of R+ has positive upper density if limsup (r -> inf) m(E n (0, r)]/r > 0, where m is Lebesgue measure.

Does every such subset contain arbitrarily long arithmetic progressions?

Actually, does every non-zero measure set contain arbitrarily long arithmetic progressions?

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[high school maths] arithmetic/algebra What's the order of operations here?

In an expression like 3t^2 should I calculate that as 3 x (t x t), or (3 x t)(3 x t) ?

In case I'm not clear lets say t = 10 that gives either:

10 x 10 x 3 = 300

Or,

(3 x 10) (3 x 10) = 30 X 30 = 900

I think its the former, but am just having a moment of uncertainty as I am doubtful whether it is one term or two..Thanks. Its part of a bigger equation that I am working on.

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I wrote heuristic C++ parsers. I did 96 bit integer arithmetic in assembly. I implemented some perverted form of thread migration on the bare metal, without any kind of OS or thread support. I did many other things that I'm too ashamed to admit. yosefk.com/blog/what-worsโ€ฆ
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The Sundays - Reading, Writing and Arithmetic
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Dotty 0.22.0-RC1 - syntactic enhancements, type-level arithmetic and more dotty.epfl.ch/blog/2020/0โ€ฆ
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Why You Cannot (Yet) (Portably) Write an "Interval Arithmetic" Library in Common Lisp within-parens.blogspot.coโ€ฆ
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EU budget is about more than arithmetic ft.com/content/86f4bf8c-5โ€ฆ
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Pursuing Geometric or Arithmetic Returns

Hi,

Based on my understanding arithmetic return is higher than geometric return once the level of leverage rises above such a level that ruin would occur in a single trade using a geometric approach. Therefore, leverage must be constrained below such a level to trade using a geometric approach, while leverage can rise above this level using an arithmetic approach.

Based on this, would it not be preferable to trade using an arithmetic approach if you have access to such a level of leverage?

To clarify:
Arithmetic approach โ€“ Not reinvesting profits/losses, making every trade using the same sum of capital.
Compound approach โ€“ Reinvesting profits/losses.

Thanks in advance for any responses.

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can solve second order diff eqs in my head but canโ€™t do simple arithmetic
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pointer arithmetic and actions

Recently I read up a bit on actions after being shown this library, and being intrigued by the concept. Initially two things I had done seemed like perfect use cases for this mode of thinking: time/duration, and position/distance. But while watching a vod of Jonathan Blow's stream when he was talking about whether to base pointer arithmetic off of the size of the of base type or just off of a byte, I realized this concept was also perfect for pointer arithmetic. When doing pointer arithmetic you never want to add to pointers, you only want to find the difference. You may add a difference, and a pointer though. As for how this might apply to Jon's actual problem, it doesn't apply directly, but I think it illuminates why dealing strictly in bytes is simpler. I have some more thoughts on what a good implementation of pointer arithmetic looks like, and on this subject in relation to dep

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Adventures in C# Optimization with SIMD intrinsics and pointer arithmetic. snowflakepowe.red/blog/adโ€ฆ
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Modulo Arithmetic help please

I truly do find this fascinating, and will need more time to wrap my head around it, but for now I need some help with this homework assignment please. I don't understand how professors think I can grap my head around this stuff in less than a week on an online class

https://imgur.com/a/BiToTjZ

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Is it possible to have dyscalculia and still be able to do arithmetic?

I have been on the fence as to if I have dyscalculia or not. I was diagnosed with ADHD and have historically struggled with algebra to the point where the teacher's have had to walk me through the class because I could not learn it all the way from grade school to university. The weird thing is I'm an accounting major and do great in my accounting courses, but that's about the max difficulty I could do regarding math. Algebra is a blank for me. I've put in hundreds of hours trying to learn algebra everywhere on the internet and in class to no avail. I unfortunately must take calculus for my degree and I can't physically do it no matter how hard I try. I don't want anybody to think I'm slacking off either. Last semester I got straight As and have maintained above a 3.60 GPA in college with an exception to anything algebra. Could it be dyscalculia or something with my ADHD?

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What is a good technique for mental arithmetic?
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Arithmetic and Algebra

Is there any 1 suggested resource for algebra and arithmetic for the perfect score in both subject(Arithmetic and Algebra).having only 4 days for my exam, well prepared for geometry and DI and completed mangoosh basic and common and Barron's frequently used 333 words for verbal section RC practicing in official book, any other suggestion also welcomed

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Any techniques you can suggest on faster mental arithmetic or is it really just practice?

I like problem solving and the abstract realm of mathematics but my mental arithmetic is absolutely horrible lol

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74181 Arithmetic Logic Unit Replica, Euclid, XBOX, Creative Mode
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Arithmetic or geometric tho?
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10 Days of Javascript - Day One ( Hello World, Data types, Arithmetic operations, Functions) youtube.com/watch?v=zZVmGโ€ฆ
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Arithmetics

So I got it. Kishimoto has named the Samurais after numbers. Namely Ichi, Ni, San, Yon, Go, Loku, Nana and finally Hachi (1-8). So these will be the names of the Samurai keys So we have Ichigo - 1 Ni? Sanda - 3 Yon? Goku - 5 Loku? Nanashi - 7 and finally, Hachimaru - 8

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Arithmetic Progression [Doubt], why n cannot be 19? I don't understand. [2nd Pic Doubt]

Question - https://imgur.com/a/SGMSouf

I don't understand why it works for n = 9 and not for n = 16.

Please help.

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TIL that elephants are so complex they are able to mourn, cry, have mental breakdowns, play the drums, paint, mimic humansโ€™ speech and show basic arithmetic skills. en.wikipedia.org/wiki/Eleโ€ฆ
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[ANN] mod: fast and safe modular arithmetic github.com/Bodigrim/mod
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Modular Arithmetic Question

https://preview.redd.it/j00vex2d3wi41.jpg?width=853&format=pjpg&auto=webp&s=8c8cf3db24433116b9508b420724a2a6c0754913

I have failed to find x and would appreciate it, if someone can tell me how to find x here.

The question is: What is the sum of the digits of the minimum x natural number which ensures these equations?

But if i can understand how to find x, i will solve the question with ease.

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If these terms contnstruct an arithmetic progression, how am I supposed to prove that a,b,c forms a geometrical progression?
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Arithmetic Progression, why (n+1)/2 is taken instead of (2n+1)/2? [Doubt]

Question - https://imgur.com/a/hORlXfR

I also don't get why n/2 for even numbers and (n+1)/2 for odd numbers.

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Projective Arithmetic and Algebra 1: Dividing by zero and some consequences

The standard arithmetic and geometry of the real line and real plane are incomplete. There are ways that we work around this incompleteness, but these workarounds can be abandoned for a more unified treatment of these things and I think that these give a more satisfying way to think about them. That's what I'll try to discuss here.


One of the things that I learned during my math training was that it was not possible to divide by zero. Even in high school, I was unsatisfied with this; surely people were just not trying hard enough. And, sure enough, when you start working with more advanced math, I learned that there are ways to do this and that it is, in fact, quite common. The only sticking point is that there is often some kind of strict formalism around how to do this, formalism which makes it inaccessible to most people resulting in workaround that let us divide by zero without actually doing it. But this formalism is not really necessary

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[Modular Arithmetic] Find x. 11^323 โ‰ก x (mod 73)

Iโ€™m having some trouble with this problem. So far Iโ€™ve found that since 323 =72(4) + 35, I reduced the problem to

(11^4)^72 * 11^35 โ‰ก x (mod 73)

(1) * 11^35 โ‰ก x (mod 73) by Fermatโ€™s Little Theorem

11^35 โ‰ก x (mod 73)

After that point Iโ€™m not sure what to do to reduce it further. Am I at least on the right track? What should my next step be?

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Mental arithmetic is totaly overrated!
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Help with Modular Arithmetic and RSA

Hi. I am trying to understand RSA, and I do and can solve if I have small primes as example, but what I don't understand is WHYs and HOWs as I never had Maths as a subject outside of elementary. I love logic though, so I can figure out given enough time and resources. I don't understand stuff like the modular multiplicative inverse, Euler's Theorem etc. So I started from the basics of Number theory and Modular arithmetic. Now I understand stuff like how A = B (MOD M) when M/A-B, Some basic arithmetic and stuff. But don't have the resources to go towards the proofs for the theorems, Modular exponentiation, How is GCD important in those things, Why is attaining PHI of the semi prime N is important etc. etc. I want to understand everything from scratch and I am unable to find courses or PDFs or videos to understand them.

I want this exact curve 1) learn number theory and Mod arithmetic -> 2) Proof of Euler's theorem using what I learnt about MOD and number theory, -> 3) Then How a

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Lamotrigine & mental arithmetic?

This might sound strange but has anyone experienced having trouble doing maths after taking lamotrigine?

I am usually very good at mental arithmetic but the last few week since I started medication, Iโ€™m making these wild mistakes that I would never make and are actually super embarrassing at work - like saying if the cost for 30 books is 1500, then thatโ€™s $500 a book, when itโ€™s $50 (I had to calculate that example right now because I couldnโ€™t figure it out for sure).

Anyway, would be super interested if anyone else has experienced this

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What are your thoughts on the chances of passing Medicare for All, under the best, and worst-case legislative arithmetic? What are your greatest hopes regarding healthcare reform, and your biggest concerns?

As a progressive, I want to believe that Medicare for All can find a way forward, in our current political climate, but honestly, Iโ€™m really starting to lose my faith, and it breaks my heart.

I know that it is possible - and tend to believe in hope. But I am so very worried.

What is the path to get Medicare for all passed, legislatively? Do progressives in this present moment, need to be more pragmatic?

What are the most probable outcomes in your opinion for healthcare reform, in the context of Medicare for All, or hybrid / single-payer option?

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Naturally occurring arithmetic error
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Me trying to do basic arithmetic
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Is there a website/app as elegant as Desmos that can plot vector valued functions in R3? Im in calc 3 atm and visuals help me learn way more than reading and studying arithmetic.
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"Arithmetic of an alternative plan: 2+2 plus the enthusiasm of the workers=5" - Soviet Union, 1931
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Snitch: A RISCV processor tuned for the highest possible energy efficiency on DP FP arithmetic arxiv.org/pdf/2002.10143.โ€ฆ
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A good arithmetic textbook?

Does this even exist? I took a pre-algebra college course in 2011 and got an A-. I was excited to learn math and becoming confident that I could finally learn it. I couldnโ€™t afford to take anymore classes as it was out of pocket money and I already had a BA.

Fast forward to now, I want to teach myself math starting from the basics and up. I thought it would be easy to go on amazon and find an arithmetic book but itโ€™s not. Whenever I read reviews on a book, people either complained the answer key had errors, or it was a book full of concepts and no problems coupled with answers OR only problems and answers and not enough explanations on each topics.

I heard of The Art of Problem Solving and read reviews on amazon but some are saying itโ€™s for gifted learners so Iโ€™m not sure if the pre-algebra will be intimidating for me. My memory sucks so I really donโ€™t remember anything Iโ€™ve learned in 2011 - especially since maths have always been a weakness for me.

I started Khan Academy but beca

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Having trouble with understanding the ALU, (my handwriting sucks). For an ALU to be considered an ALU does it have to have all these arithmetic functions plus whatever logic functions are required. Or can you make a simple ALU with a full adder that can subtract with an OR gate and call it a day?
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[High school arithmetic] I need help for this. I kinda have an idea of what to do but I don't actually know how to do it and how to justify it. Any help is welcome.
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Mental arithmetic

Guys, through my studies I had the feeling that my mental arithmetic capabilities got significantly worse. I'm at the point now that I have my Bachelor but everytime I need to calculate something in my mind it's like I have a stroke. Is this normal? Am I the only one? Please help!

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Doing propositional logic with sets or arithmetic

In his "Beginner's Further Guide to Mathematical Logic" Smullyan shows a way to do propositional logic in set theory, beginning on page 3. On page 5, Smullyan lays out a way to do propositional logic with algebraic expressions. Number 1 gets used as true, zero as false, and various arithmetic expressions represent connectives "and", "or", etc. Even and odd values of the arithmetic expressions are taken as true and false values of logical expressions using the connectives.

Where the set theory representation seems like a like a direct, obvious consequence of defining union and intersection using logical connectives, the algebraic representation seems a lot less connected, maybe even totally unconnected.

Why does algebra have the ability to represent propositional logic? Does this have something to do with the expressivity of Peano Arithmetic, or is there a direct connection (like union defined with "or" and intersection defined with "and ") that I'm missing?

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