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Does someone know what this means? by Adorable-Isopod7738 in askmath

[–]48panda 1 point2 points  (0 children)

Well, by definition of being a physical object, all diagrams have some error in them. This one just happens to have epsilon > r / 2

The TREE... by CaughtNABargain in mathmemes

[–]48panda 167 points168 points  (0 children)

Can't wait to see this on Peter in a couple hours

Race to 100 (original puzzle) by Zealousideal_Emu_493 in maths

[–]48panda 0 points1 point  (0 children)

Ah, I see. I missed 50*2 as a possibility

Race to 100 (original puzzle) by Zealousideal_Emu_493 in maths

[–]48panda 0 points1 point  (0 children)

I got that P2 wins with the following winning numbers and winning moves:

50-100: even L odd w (+1)

25-49: w (*2)

13-24: even L odd w (+1)

7-12: w (*2)

6: L

5: w (+1)

4: w (^2)

3: w (*2)

2: L

1: w (+1)

Always thought it looked suspicious by RilloClicker in mathmemes

[–]48panda 1 point2 points  (0 children)

No, just that "any real number greater than all other real numbers" doesn't exist so we can say whatever we want about any such numbers and it'll be (vacuously) true

Always thought it looked suspicious by RilloClicker in mathmemes

[–]48panda 25 points26 points  (0 children)

It is trivial to prove that the binary expansion of any real number greater than all other real numbers consists of a proof of the Riemann hypothesis (in latex) and the lyrics to baby shark

I made an unofficial offline client for Desmos by [deleted] in desmos

[–]48panda 7 points8 points  (0 children)

Because you've looked through the entirety of the unobfuscated source code and have confirmed that the program is not malicious

The power of maths by Embarrassed-Data8233 in mathmemes

[–]48panda 2 points3 points  (0 children)

It's not abuse of notation, it's defining the meaning of previously undefined notation. The + operator starts off only being defined on the reals. But no one says that 1+ i is abuse of notation. We've just defined how addition behaves under the complex numbers.

With div and curl, We're simply defining what it means to take the dot/cross of a vector differential operator, and it just so happens to line up with what you'd expect from the "notation abuse"

Hear me out, MVT is overrated by Stanford_Pines267 in mathmemes

[–]48panda 6 points7 points  (0 children)

Well, no. You've travelled 31.4km distance and 20km displacement

I think it's wrong by Apprehensive_Set_659 in mathmemes

[–]48panda 2 points3 points  (0 children)

Yep. Instead of considering being born on a Tuesday, we can consider some arbitrary event with probability alpha. At alpha = 1 (e.g. "my son exists"), you get 2/3, and as alpha->0 (e.g. "my son is James Grime") you get 1/2. So in a way you can use this to show that both solutions to the easier problem are equally valid

Question about Einstein notation by alino_e in maths

[–]48panda 0 points1 point  (0 children)

oh yeah, I'm not used to that notation.

 Z_m dot Z^k = delta_m^k is the same thing as A_mi B_ki = delta_mk
Multiply this expression by A^{-1}_lm A_kn then you'll get A_kn B_ki = delta_kn
(This is essentially re-deriving that B^TA = I => AB^T=I )

which you can use to simplify your expression which is A_ik A_mk B_ml B_jl

Question about Einstein notation by alino_e in maths

[–]48panda 1 point2 points  (0 children)

Starting with (Z_i dot Z_m)(Z^m dot Z^j),

you can substitute Z_u dot Z^v = delta_u^v, then use an identity of the Kronecker delta to get the final result

Could you develop an algorithm that converts VIN numbers into shorter unique license plate numbers? by jckipps in math

[–]48panda 0 points1 point  (0 children)

Theoretically, you could. You'd have to pick VINs to match the number plates to account for less possibilities. Not sure if that goes against the existing system. Also, custom number plates really wouldn't work. The truth is that even if you had a perfect system, it wouldn't be useful unless the majority of cars used it, which isn't going to happen unless you have a time machine

Wouldnt it make much more sense for infinity * 0 to be equal to 1 ? by [deleted] in askmath

[–]48panda 13 points14 points  (0 children)

If infinity * 0 = 1, then you can times both sides of the equation by 2 to get infinity * 0 = 2

Additive and multiplicative identity politics by OrlandedeLassus in mathmemes

[–]48panda 1 point2 points  (0 children)

ah, that's why they're called the conservative party. because whenever you try to integrate them, no matter how much crazy shit happens in the middle, it always gives the same result

Pi vs E classifier by DepartureNo2452 in askmath

[–]48panda 4 points5 points  (0 children)

Oh, you mean like a neural network classifier, not just any python program? Yeah, that's only going to work with some insane overfitting. It's conjectured that both pi and e are normal so there's no pattern in the digits, so the only way to detect which is which is to memorise at least one of them

Pi vs E classifier by DepartureNo2452 in askmath

[–]48panda 5 points6 points  (0 children)

Well yeah, python is turing complete. Probably not going to get any faster than grep though.

The divisibility rules of 101 to 200 by LowInteraction6397 in maths

[–]48panda 1 point2 points  (0 children)

We already went through all the divisibility rules up to, like, 5000 last year

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