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Is there a formal way of representing "currency denominations?" by Augustus Himmlewick - Sun, 20 May 2018 16:15:17 EST ID:KdxuUdQ5 No.15657 Ignore Report Reply Quick Reply
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I've recently been trying to write a tail-recursive program which counts how many different ways `x` amount of money can be made using `y` denominations of currency.

I started making progress when I noticed that my denominations didn't need to have different values. They could all be worth the same amount, and the program would still work correctly. It seemed a little odd to me, that I was generating unique combinations of things that all had the same integral value. On my computer I just see:

f( 1 ) = 1
f( 2 ) = 1
f( 1 ) =/= f( 2 )

^and that makes me a little uncomfortable. Now, because these kinds of rules are actually really useful inside of my computer, I was wondering if they've been rigorously studied by mathematicians. Is there a name for these things? Are there papers I can read?
>>
Charles Bellertune - Tue, 22 May 2018 02:52:07 EST ID:KdxuUdQ5 No.15659 Ignore Report Quick Reply
I found these things called "Diophantine equations" and I think they're related to my problem.


how i relearned erry mathsz by Lydia Lightshit - Fri, 05 Feb 2016 02:37:19 EST ID:mVsq12K/ No.15040 Ignore Report Reply Quick Reply
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Everyday before work, I woke up 2 hours early and forced myself to read/do exercises of the following books. (this later became 3 hours). I averaged 3 books per month if they were survey books, and about 1-3 months for a rigorous book. This became an easy routine after the first week, and I'm still doing this.

>1) Daily Rituals by Mason Currey
https://books.google.ca/books/about/Daily_Rituals.html?id=hA-MoAEACAAJ
This is where I got the idea of making a routine from, it's a survey of historical artists, philosophers, scientists ect who all had a routine in order to get work done consistently. Franz Kafka would split his sleep up into 2 section in order to fit in work beside his regular office job.

>2) Basic College Mathematics by M. Lial et all
https://books.google.ca/books?id=ucUDMAEACAAJ&dq=basic+college+mathematics
As mentioned before in here this covers elementary school and Jr. High math basically. You can just survey this for the most part (not do any exercises) unless you don't understand something, then do the exercises. Took 3 days to survey this. When I later took Harvard's CS50 computer science course, the first lecture about Binary numbers directly was related to this book's first chapter on whole numbers. I torrented this book.

>3)Basic Mathematics by Serge Lang
https://books.google.ca/books?id=gBtvo480ng4C&dq=basic+mathematics
I got out the notepaper and did most of the exercises by hand. This was all focused on reasoning, why is this true, how do we prove this is true, ect. This book teaches you so well that applied calculus is your bitch afterwards. I torrented this book too since author dead, copies are like $80 on amazon.

>4)Introduction to Mathematical Reasoning by Eccles
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Emma Drundlestock - Mon, 06 Feb 2017 13:38:21 EST ID:0v0QG0m/ No.15330 Ignore Report Quick Reply
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>>15326
>That's a slow pace,
Yes, I know it. That's because I got my bachelor degree in maths but never studied it seriously until now, that I have noticed my lack of foundations; and it's because of that that I don't go on unless I'm pretty sure I have solved and understood every single part of the text and the problems, specially set theory and logic, wich are basic for all mathematics. Solving all the doubts arising when studying mathematics is a very important part of our study routine if one really wants to understand them... and it's probably the most tedious part.

>Shoenield's mathematical logic
I'd swear it was a model theory book. I remember I didn't buy it due to that, and bought Richard E. Hodel's An Introduction to Mathematical Logic instead.
>>
Jarvis Pessledale - Tue, 14 Mar 2017 17:19:17 EST ID:ueMHQ1BO No.15419 Ignore Report Quick Reply
>>15040
sick, now read a Math physics textbook and become a god
>>
George Blatherbanks - Sat, 18 Mar 2017 16:35:05 EST ID:ck7N7PYR No.15422 Ignore Report Quick Reply
Frankel's The Geometry of Physics: A very good way to learn what modern geometry tastes like.
>>
Albert Bivinghall - Tue, 22 Aug 2017 03:01:37 EST ID:OVoqDNaY No.15550 Ignore Report Quick Reply
bump
>>
Ernest Claystone - Mon, 21 May 2018 10:51:24 EST ID:hr6uWBv0 No.15658 Ignore Report Quick Reply
im gonna make use of this one day


anti-integral sentiment by Nigel Murddock - Sat, 19 May 2018 20:55:41 EST ID:7K6K80ZQ No.15656 Ignore Report Reply Quick Reply
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why do women hate math?


Watch my set please by Basil Fussletut - Fri, 18 Nov 2016 11:24:03 EST ID:FFd5rNZG No.15275 Ignore Report Reply Quick Reply
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Hey /math/, can you guys watch my set for me? I'll be right back.
15 posts and 5 images omitted. Click Reply to view.
>>
Thomas Derringbock - Thu, 23 Mar 2017 10:27:39 EST ID:2BTsxPZ9 No.15433 Ignore Report Quick Reply
>>15432
What do you advocate instead of sets? Topoi or some new-fangled nonsense?
>>
Nigel Nublingstock - Fri, 24 Mar 2017 01:19:20 EST ID:vrOFV9fT No.15434 Ignore Report Quick Reply
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>>15432

fuck you
>>
Hugh Guffingfield - Wed, 09 May 2018 12:39:40 EST ID:NVr7Ludj No.15649 Ignore Report Quick Reply
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You know what blocked me in college? Discovering water-tight proofs. I honor and love solid proofs but sometimes you be sittin with a coffee and whiskey in your lap makin pen mark on the paper and all you're operating by is your intuition. Don't let yourself be in the canyon lookin up from the bottom of proof atomics. We can occupy ourselves forever with hairsplitting and defining what we already know. Let's use a crutch like we've always used. Call it axiomatic if you're more comfortable with it. The point is, you're on the struts that have made the building... you don't need to look up from the bottom of the hole to see the top of the building. Be creative. Be a true mathematician. Don't get stifled by proof theory. Get some muthafuckin coffee, get some whiskey, and worship the primes and break bank encryption. [email protected]*EstarStar
>>
Ernest Drivingstutch - Sat, 12 May 2018 05:26:04 EST ID:Ng8/H/+7 No.15653 Ignore Report Quick Reply
Yes
>>
Sidney Pickbanks - Sat, 19 May 2018 00:59:50 EST ID:drSlH/C1 No.15655 Ignore Report Quick Reply
>>15649

The vast majority of mathematicians don't understand how inference rules and logic actually work from an axiomatic level.


Math Learning by Molly Broshchuck - Fri, 04 May 2018 01:28:37 EST ID:YcbvwtmL No.15647 Ignore Report Reply Quick Reply
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Help a dummy out and name the best websites to learn math on. Thanks frens!
>>
Augustus Bunstone - Sun, 06 May 2018 02:14:16 EST ID:drSlH/C1 No.15648 Ignore Report Quick Reply
>>15647

What kind of math?
>>
Sophie Hegglepan - Thu, 17 May 2018 19:21:52 EST ID:rkLtn+N1 No.15654 Ignore Report Quick Reply
420chan.org

Just post your question here and I'll get back to you in like 4 to 6 weeks.


What's the biggest number? by Nathaniel Sacklespear - Fri, 23 Sep 2016 09:54:08 EST ID:XssdERJk No.15209 Ignore Report Reply Quick Reply
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Assume we had all the possible methods of information storage in the universe and all the resources of the universe at our whimsical disposal.

What's the largest number we could put down in some kind of recording before we ran out of universe?

So I guess the core question I'm asking is what's the most compact way to write large numbers? Is there anything that beats out scientific notation? And what's the greatest extreme to which we could conceivably take this?
39 posts and 4 images omitted. Click Reply to view.
>>
Henry Hunningstidging - Wed, 21 Mar 2018 03:37:51 EST ID:L0p96aSa No.15634 Ignore Report Quick Reply
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infinity lol
>>
Charles Paffinghall - Thu, 22 Mar 2018 22:03:47 EST ID:5jiNtEAL No.15636 Ignore Report Quick Reply
>>15634
no
aleph^infinty
>>
Hugh Guffingfield - Wed, 09 May 2018 12:47:41 EST ID:NVr7Ludj No.15650 Ignore Report Quick Reply
If you wanted to be ethical, you wouldn't go about utilizing protons and neutrons needed to sustain life to save information for your 'Mirror Universal Computer." Of course you could take a torch to it all and set it all on fire. You'd need fine tweezers to configure those particles to suit your computation engine, and perhaps the holy grail of mathematics[: 'What configuration is needed to gain NP advantage...e.g.: how do I obtain energy out of a dying system;] EnEffZero)XQJZGueessTheLetterEtoanirshdlcwumfygpbvkxqjz
>>
Hannah Dartham - Thu, 10 May 2018 13:56:37 EST ID:drSlH/C1 No.15651 Ignore Report Quick Reply
>>15636 aleph^infinity + 1 is larger
>>
Doggo can Dance - Fri, 11 May 2018 00:01:14 EST ID:AQ7xCSUt No.15652 Ignore Report Quick Reply
>>15617
wait... from zero to nine, the largest interger would be nime.
and if you go up to ten then the largest number would be nimety-nime.


Calc by Fry & Leela - Sun, 16 Jul 2017 12:43:38 EST ID:Rhgh4/nK No.15536 Ignore Report Reply Quick Reply
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Can anyone tell me where to begin with this problem? I'm clueless. Our professor didn't cover it. I imagine start by taking d/dx and plugging the values in at some point?
Thanks
3 posts omitted. Click Reply to view.
>>
Jack Bimmleshit - Sat, 11 Nov 2017 17:51:42 EST ID:y7H0hQp+ No.15583 Ignore Report Quick Reply
>>15540
or, an inflection point if f''(x) = 0
>>
Jack Ciblinghood - Sat, 18 Nov 2017 17:25:36 EST ID:BDm+BNlx No.15586 Ignore Report Quick Reply
>>15583

The concavity has to change for it to be an inflection point. If it's concave up, then a place where f''(x)=0, then goes back to being concave up, it's not an inflection point.
>>
Ian Chollystock - Thu, 28 Dec 2017 23:16:23 EST ID:QQuXTugO No.15599 Ignore Report Quick Reply
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>>15536
What I would do first OP is I would graph the function and look at the range between 0 and 4 on the X axis and see if there's an obvious maximum. In this case, it looks like there is one.
>>
Edward Grimridge - Fri, 20 Apr 2018 19:17:39 EST ID:H+Iq8AnM No.15645 Ignore Report Quick Reply
So Mins, Maxes, and Extrema are Calculus concepts. You'd have to find f prime or f'(x) which is the same thing as the derivative. Derivative is -e^(-x)x^(2)+2e^(-x)x you would then set that function = 0 and find the x's. x should = 0 and 2 Make a line and write down x = 0 and x = 2. Then plug in -1 to derivative check if value is - or +. If negative, funciton is decreasing from -infinity to 0 and if positive, function is increasing from -infinity to 0. Plug in x=1 and do the same thing as before. Find out if answer is negative or positive. and plug in x=3 and do the same thing once more. Max value should be when function goes from increasing to decreasing or positive to negative.
>>
Edward Grimridge - Fri, 20 Apr 2018 19:27:04 EST ID:H+Iq8AnM No.15646 Ignore Report Quick Reply
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>>15536


Dabble by Hugh Wicklelatch - Tue, 21 Mar 2017 08:41:37 EST ID:6dRMI9a4 No.15425 Ignore Report Reply Quick Reply
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I have hardly a basis for math and forgot most of it anyway.
I'd like to get my math level a bit up, it seems like fun now

How do i start?
>>
Fanny Dommlestock - Tue, 21 Mar 2017 09:13:09 EST ID:1If8Lhdp No.15426 Ignore Report Quick Reply
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Get a textbook, read it, and do the exercises. You can also do online courses. Even though it's not arithmetic I would recommend doing a basic logic textbook since it's fun and important for mathematical reasoning. Math is some kind of meta-language, so you will advance faster if you have people you can talk to about it. In person is probably better than online, but even that is great. You can check out mathexchange or just post whatever you're thinking about on here.
>>
Molly Mommerbury - Wed, 11 Apr 2018 14:09:43 EST ID:81ybSDIP No.15642 Ignore Report Quick Reply
>>15426
I agree. When you're outside of the forced, structured regiment of school you may find yourself slip A LOT. If you don't commit to a routine, a schedule, you'll be that guy who reads and does math for 2 days, takes a break, and forgets all the shit he just toiled over to learn. STAY COMMITED, BE HONEST WITH AND STUDY YOUR WEAKNESSES AND MISTAKES.
>>
Molly Mommerbury - Wed, 11 Apr 2018 14:14:30 EST ID:81ybSDIP No.15643 Ignore Report Quick Reply
>>15425
I agree. When you're outside of the forced, structured regiment of school you may find yourself slip A LOT. If you don't commit to a routine, a schedule, you'll be that guy who reads and does math for 2 days, takes a break, and forgets all the shit he just toiled over to learn. STAY COMMITED, BE HONEST WITH AND STUDY YOUR WEAKNESSES AND MISTAKES.
>>
Isabella Singerhidge - Thu, 19 Apr 2018 16:12:23 EST ID:aQB82KvS No.15644 Ignore Report Quick Reply
are you good with geometry? thats pretty foundational to higher math. trigonometry specifically is like, the bridge to a bunch of crazy shit


Statistics Question by Ian Chemmleforth - Sun, 18 Feb 2018 16:36:31 EST ID:JCgRdXcX No.15609 Ignore Report Reply Quick Reply
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I'm helping a friend with her thesis and I can't decide what statistics test to use.

She has an experimental and control group, and she also data on the group members' gender. We've determined the emperimental group had higher test scores, which is a simple t-test.
If she wants to measure *if girls or boys in the control group had higher test scores*, what would be the test to run? Independent samples t-test can't be used because there's overlap in the groups.

Do we just look for correlation?
Thank you.
>>
Esther Manningwill - Sun, 18 Feb 2018 17:57:13 EST ID:sR7kJ2DP No.15611 Ignore Report Quick Reply
>>15609
I actually figured it out right after I posted it, but there's not a delete thread option anymore. Nobump!
>>
Molly Mommerbury - Wed, 11 Apr 2018 13:55:37 EST ID:81ybSDIP No.15641 Ignore Report Quick Reply
>>15611
lol. based on what I've seen from these other threads, no one would have helped you anyways.


Ready Player One ARG? by Martha Pondersick - Sun, 25 Mar 2018 10:27:05 EST ID:i6iS0x2M No.15638 Ignore Report Reply Quick Reply
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DICKS EVERYWHERE
>>
Phoebe Dubblechetch - Sun, 01 Apr 2018 05:04:47 EST ID:X7NqDoKA No.15640 Ignore Report Quick Reply
>>15638
That looks to me like one of these: https://www.youtube.com/watch?v=ygcGfnVM6Ho


Hey Neeeeerd by Alice Bleffingford - Sun, 23 Jul 2017 18:23:32 EST ID:n3nShEOS No.15542 Ignore Report Reply Quick Reply
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Why do you post here? Wouldn't it be easier to go to a forum or something that is specifically created for mathematics discussion? Why do you post here and wait like 4 weeks for a reply from some stoned hippy when you can go somewhere else for quicker and more informed input?
7 posts and 1 images omitted. Click Reply to view.
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Priscilla Blucklewit - Fri, 10 Nov 2017 02:54:44 EST ID:m52FE4m4 No.15582 Ignore Report Quick Reply
>>15543
the other boards actually get traffic

i thought math nerds were supposed to be smart guess not LOL
>>
Hamilton Gacklebanks - Thu, 15 Feb 2018 07:54:31 EST ID:QvmnWvcn No.15608 Ignore Report Quick Reply
PORN.
>>
Ian Chemmleforth - Sun, 18 Feb 2018 17:09:36 EST ID:JCgRdXcX No.15610 Ignore Report Quick Reply
It should honestly be merged with some other STEM boards. It's dumb to have 50 boards with 4 posts/week instead of a few boards with healthy activity.
>>
Charles Paffinghall - Thu, 22 Mar 2018 22:05:30 EST ID:5jiNtEAL No.15637 Ignore Report Quick Reply
>>15542
for the same reason jesus hung out with hookers and leppers, because he was one
>>
Martha Bobberhall - Thu, 29 Mar 2018 05:39:35 EST ID:suE+DM+5 No.15639 Ignore Report Quick Reply
i ' m f u c k i n g h i g h , m a a a a n n n n n n n n n


counting thread by Lillian Bardford - Tue, 13 Mar 2018 08:40:23 EST ID:a/tOQ260 No.15625 Ignore Report Reply Quick Reply
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1
>>
Jenny Blinderwill - Fri, 16 Mar 2018 22:20:30 EST ID:n//xN8tQ No.15629 Ignore Report Quick Reply
5

let's count a sequence, shall we?
>>
Eugene Honeycocke - Thu, 22 Mar 2018 01:18:03 EST ID:drSlH/C1 No.15635 Ignore Report Quick Reply
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>>15625


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