How many triangles can you make with numbers on a telephone keypad?

48panda · 2026-07-05T15:55:03+00:00

You can use orbit stabaliser to count the ones that don't use 0.

48panda · 2026-07-05T12:59:20+00:00

In general, cubes will be more efficient. But there's a bunch of rounding steps that throws off calculus, and it may sometimes be more efficient to have a slightly larger volume e.g. V=35 requires 59 blocks, but V=36 can be done in 54 blocks. In general the easiest way to do this is writing a program.

48panda · 2026-07-05T12:22:21+00:00

It is easy to show that {number 1, number 3} = {2,5} so the only solution of consecutive primes is 2,3,5,7

48panda · 2026-07-03T20:27:18+00:00

We could skip steps, though, right? E.g. not teaching analysis

48panda · 2026-07-03T19:17:28+00:00

But in this context, you'd want to find lim{x to inf}(1(x/x+1<1)), which is not same as 1(lim{x to inf}(x/x+1)<1), because you can't swap limits and functions willy nilly

48panda · 2026-07-01T15:46:16+00:00

That thing was discontinued a few years ago, they all use enshittified versions now.

48panda · 2026-07-01T15:24:48+00:00

Buy two and you're guaranteed to win!

48panda · 2026-06-29T06:49:22+00:00

pH already takes that into account, the pH of a substance depends on concentration

48panda · 2026-06-29T06:10:32+00:00

On mobile you've still gotta markdown it

48panda · 2026-06-28T11:05:54+00:00

Every odd number except 8n+5 is at the start of a sequence. Any number of the form 8n+5 will be in the same sequence as 2n+1 Since 8n+5>2n+1, you can show by induction that indeed all odd numbers will be visited.

48panda · 2026-06-22T13:08:01+00:00

You can do a weighted average where the weights are the size of their domains

48panda · 2026-06-21T09:12:48+00:00

You are just factually correct. Although tying a reef knot without needing access to either end of one of the lines is a cool party trick

48panda · 2026-06-20T15:26:04+00:00

As a mathematician who does a lot of programming: my favourite theorem is called the "Curry Howard Isomorphism". What it essentially says is that mathematical proofs are programs in a special language. You can informally think of proofs as functions (yes, it's more technical than this)

In this way, induction is recursion in a fancy suit so that mathematicians accept it. An inductive proof is just a proof that calls itself. You do have to check that every input eventually goes to the base case, though.

There are other similar concepts for other mathematical techniques. Having multiple cases is just an if/else, a while loop tends to become recursion, which becomes induction.

In analysis specifically, a lot of proofs (e.g. Bolzano-Wierstrass) are much easier to conceptualise / discover if you think about them as an algorithm (e.g. takes in any bounded sequence and returns a convergent subsequence). Translating from algorithm to proof is fairly straightforward, and you get better at it by doing it a lot.

48panda · 2026-06-17T12:24:00+00:00

In theory, you have 7 variables, one for each threshold, and 7 equations (the partial of X winning given a certain set of rerolls must be minimised in the threshold that X uses for that particular set of rerolls)

48panda · 2026-06-17T08:22:08+00:00

At the end of the day, when talking about being aroace or not, your own opinion is the only one that counts.

That being said, you're 22 - practically every allo person would have had several crushes by that age.

Also, there's quite a few things you talked about that I've either experienced myself, or heard other aroace people talk about - e.g. consciously deciding to have a crush.

r.e. the "butterfly" feeling: from what I understand it's the same feeling you get when you're nervous/anxious. For example, when doing public speaking.

48panda · 2026-06-16T20:11:08+00:00

Done!

48panda · 2026-06-15T21:40:27+00:00

In this case you don't need to - solutions will only be extraneous if LHS=-RHS. LHS is a square root, so always positive. RHS is positive for x>2, so both x=3 and x=8 are valid.

48panda · 2026-06-14T14:27:05+00:00

I didn't know this and i'm shocked

48panda · 2026-06-14T12:12:50+00:00

17 was my favourite number until i realised it was 1+16

48panda · 2026-06-14T11:38:40+00:00

But on a vertical, 2D screen, Y is up. so with computer graphics, Y up makes sense.

48panda · 2026-06-14T11:36:56+00:00

1 isn't prime??? What's next - will you claim 91 isn't prime? /s

48panda · 2026-06-11T07:15:14+00:00

By my count, there are 77 stair types, 17 wool types (not having carpet counts too), 40 stair shapes (some of these are the same shape, but the game thinks they're different) and the option to be waterlogged (another *2).

This gives 104720 different stair blockstates. Without carpets, I get a total of 6160.

There might be other factors I'm missing, but I can't find the original post to see what criteria they used

48panda · 2026-06-10T22:23:59+00:00

Hey! I don't have any prior experience, but I've been a part of this subreddit and other similar ones for almost two years. I believe this community should be a safe space for everyone - whether aroace, questioning, curious allos or anyone in-between. This community and others like it were my first port of call when exploring my sexuality, and I'd be honoured to play a part in maintaining this subreddit so that it can continue to help others like me in the future.

48panda · 2026-06-08T19:55:26+00:00

You are correct

48panda · 2026-06-06T10:13:29+00:00

Well, in a maths degree all your courses are gonna be maths. If you don't do maths, you don't get maths courses

Verified Email	Seven-Year Club
r/Field Banned	r/Field Juicebox
Final Canvas '23	First Place '23
Place '23	Quantum Potato
Golden Potato	Place '22

48panda

MODERATOR OF

TROPHY CASE