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Math Misery @mathmisery.bsky.social · 21h

today is a nice silly date for some number fun

10/10/25

10 = 5*2
25 = 5^2

and if you want to make one of those stupid viral math problems because of ambiguous notation, then resolve this:

5*2/5*2/5^2 = ? Is it 1/25 or 4?

also, 1010 as a base 2 number is 8 + 2 = 10 :)

Math Misery @mathmisery.bsky.social · 23h

Data Modeling event in DC called the Washington Copulas

Matt Macauley @visualalgebra.bsky.social · 1d

Mathematical Finance event in Wellington called the New Zealand All Black-Scholes

Math Misery @mathmisery.bsky.social · 1d

Combinatorics event in Flushing called the New York Stem

Math Misery @mathmisery.bsky.social · 1d

Combinatorics event in Flushing called the New York Stem

Matt Macauley @visualalgebra.bsky.social · 1d

Numerical Linear Algebra event in Florida called the Tampa Bay Rayleigh quotients

Grant @syncingsinking.bsky.social · 1d

Probability Theory event in Nevada called the Las Vegas Sample Spaces

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Matt Macauley @visualalgebra.bsky.social · 1d

Numerical Linear Algebra event in Florida called the Tampa Bay Rayleigh quotients

Grant @syncingsinking.bsky.social · 1d

Probability Theory event in Nevada called the Las Vegas Sample Spaces

Matt Macauley @visualalgebra.bsky.social · 1d

Back-to-back topology events in the Twin Cities called the Minnesota Hopf Lynx and the Minnesota Wild Knots

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Vlad the Inhaler by znmeb 🇺🇦 🇨🇦 🇬🇱 🇵🇦 @algocompsynth.bsky.social · 1d

Computational algebra event in Ontario called the Toronto Maple

Matt Macauley @visualalgebra.bsky.social · 1d

Back-to-back topology events in the Twin Cities called the Minnesota Hopf Lynx and the Minnesota Wild Knots

Vlad the Inhaler by znmeb 🇺🇦 🇨🇦 🇬🇱 🇵🇦 @algocompsynth.bsky.social · 1d

Differential equation solvers event in Alberta called the Edmonton Euler Method

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Vlad the Inhaler by znmeb 🇺🇦 🇨🇦 🇬🇱 🇵🇦 @algocompsynth.bsky.social · 1d

Differential equation solvers event in Alberta called the Edmonton Euler Method

Math Misery @mathmisery.bsky.social · 1d

Simulation event in Ohio called The Cleveland Brownian Motion

Matt Macauley @visualalgebra.bsky.social · 1d

Algebraic number theory event in Southern California called The Los Angeles Ramified Primes

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Grant @syncingsinking.bsky.social · 1d

An Apollonian geometry event in Wisconsin called The Green Bay Circle Packers

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Math Misery @mathmisery.bsky.social · 1d

hi! :)

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Math Misery @mathmisery.bsky.social · 1d

Simulation event in Ohio called The Cleveland Brownian Motion

Matt Macauley @visualalgebra.bsky.social · 1d

Algebraic number theory event in Southern California called The Los Angeles Ramified Primes

Grant @syncingsinking.bsky.social · 1d

Higher-dimensional quadric surfaces event in Washington state called The Seattle Superconics

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Math Misery @mathmisery.bsky.social · 1d

For me, it was the "undoing of the product rule"

(fg)' = f'g + g'f
so that when I write integrals around everything it's
fg = ∫f'g + ∫g'f and then depending on the problem, it's either a u,v thought or a u, dv thought.

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Math Misery @mathmisery.bsky.social · 8d

Ah, fair enough.

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Richard McElreath 🐈‍⬛ @rmcelreath.bsky.social · 9d

So another example of this perhaps doi.org/10.1098/rsos...

The natural selection of bad science | Royal Society Open Science

Poor research design and data analysis encourage false-positive findings. Such poor methods persist despite perennial calls for improvement, suggesting that they result from something more than just m...

doi.org

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Math Misery @mathmisery.bsky.social · 9d

Do you feel that some of the aversion about collinearity is a function of which statistical methods were taught / available to the individuals working with the data and the underlying assumptions about those methods?

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Math Misery @mathmisery.bsky.social · 9d

Brew HaHa! In Wilmington, DE :)

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Math Misery @mathmisery.bsky.social · 19d

we can do a bunch of inspection. y = 2x^2 + x from the 1st eq. the 2nd eq becomes (2x^2 + x)*x^2 + 7x = 10. by inspection x = 1 solves it and so y = 3. another solution is x = -2 making y = 6. and both give x + y = 4. eq 2 is also y = (10 - 7x)/x^2, so eq 1 and 2 coincide in two spots (1,3), (-2,6)

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Steve Phelps @mathtechcoach.bsky.social · Aug 5

Enjoy this square rollin' 'round a non-regular pentagon.

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Steve Phelps @mathtechcoach.bsky.social · Aug 2

Here is another of my favorite triangle things

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Math Misery @mathmisery.bsky.social · Aug 2

i enjoy these with the tracer the most!

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Steve Phelps @mathtechcoach.bsky.social · Aug 1

Enjoy this pentagon rolling around an internal equilateral triangle.

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Math Misery @mathmisery.bsky.social · Jul 26

I had a boss who would say "apples and elephants" and that's been my phrase ever since

Adam Sharp @adamcsharp.bsky.social · Jul 26

An English phrase for describing two things (or people) that are completely different is “like chalk and cheese.” A similar phrase in Czech is jako nebe a dudy. It means “like heaven and bagpipes.”

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Math Misery @mathmisery.bsky.social · Jul 26

Do "pineapple" next [unless if you already did it!] :D

Math Misery @mathmisery.bsky.social · Jul 26

cute, three contact checks :)

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Steve Phelps @mathtechcoach.bsky.social · Jul 25

Enjoy this pentagon rolling around a square.

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Math Misery @mathmisery.bsky.social · Jul 25

true, for non-prime odds there's the scaled version of the prime one, for example:

(3,4,5) --> (9,12,15) but we can also have (9,40,41)

the difference by 1 is by design:

a^2 + b^2 = c^2 --> a^2 = c^2 - b^2 = (c+b)(c-b) and we can set c-b = 1 forcing c+b = a^2; for prime a, c-b has to be 1.

#math

Math Misery @mathmisery.bsky.social · Jul 25

A fun little thing you can do with this is to chain various Pythagorean triples into a larger sum of squares. For example,

13^2 + 84^2 = 85^2
and knowing that 5 * 17 = 85
we also have (5*17)^2 + (12*17)^2 = (13*17)^2 by scaling (5, 12, 13)
so, then we have 13^2 + 84^2 + 204^2 = 221^2

#math

Math Misery @mathmisery.bsky.social · Jul 24

Happy Pythagorean Triple Day!

7^2 + 24^2 = 25^2

How to generate a Pythagorean Triple when the small side is a prime number:

p^2 + ((p^2 - 1)/2)^2 = ((p^2 + 1)/2)^2

so the triple is (p, (p^2 - 1)/2, (p^2 + 1)/2)

5^2 + 12^2 = 13^2 (notice 12 + 13 = 5^2)
11^2 + 60^2 = 61^2 (60 + 61 = 11^2)

#math

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