ℝolliℵg M∀th Thr∑a∂

otm

why need endless time? do you read novels in your spare time? think of it as one of those!

maybe you can read math books at the same speed as you do novels, not me

why does it have to be at the same speed?

at one point in my life I had the habit of reading a page of Hilbert's Geometry and the Imagination a day. I never finished it but it doesn't matter; it was a blast

:)

https://sites.tufts.edu/gerrymandr/

"A 5-day summer school will be offered at Tufts University from August 7-11, 2017, with the principal purpose of training mathematicians to be expert witnesses for court cases on redistricting and gerrymandering."

that's hot. I wish I could audit that

Is there in iPhone app that I can use to solve or graph or factor algebraic equations? Basically do what my old TI-89 could do back in my high school days, (except in color obv.)?

love to read stats bantz http://davegiles.blogspot.com/2011/09/micronumerosity.html

asically do what my old TI-89 could do back in my high school days, (except in color obv.)?

this is a betrayal

Mr. Snurb, Wolfram Alpha is useful. It even has an iPhone app. In addition to factoring, it can be used to integrate or even solve mildly complicated PDE/sODEs. The syntax, IMO, is much nicer than a calculator you can use natural language or TeX-like formatting.

https://www.youtube.com/watch?v=AmgkSdhK4K8

Very sad: http://ifpnews.com/exclusive/iran-math-genius-die-cancer/

:(

voevodsky dead at 51 https://www.ias.edu/news/2017/vladimir-voevodsky

fields metalist dropping like flies

a terrible tragedy for math. he supervised to a close friend of mine, who told me they had been making progress on some problems as recently as this summer. needless to say friend is devastated

RIP

Must admit I was thinking this revive would be about Monty Hall problem.

extremely worthwhile Voevodsky content:

https://www.youtube.com/watch?v=O45LaFsaqMA

that's what you get for inventing calculus bitch lmao https://t.co/qwE6dL6fNH

— daddy. (@TayWest) December 12, 2017

https://en.wikipedia.org/wiki/Spherical_coordinate_system#Integration_and_differentiation_in_spherical_coordinates

does anybody know the line elements in 4D hyperspherical coordinates or how to go about deriving them? i need to know for a school project and didn't realize this information would be so hard to find lol

ok i guess this is the way to do it:

https://math.stackexchange.com/questions/74442/line-element-dl-in-spherical-coordinates-derivation-diagram

wow that was easy

Really?

Seems like you “just” stick another sin and cos on the end and then “just” do your calculations

So about those octonions

they squirt ink and make you cry

Lol

https://upload.wikimedia.org/wikipedia/commons/thumb/2/2d/FanoPlane.svg/250px-FanoPlane.svg.png

PY DERE! Have a Jupyter notebook question that I may hit you with in a little bit

Okay, been trying to make slides using nbconvert. It ends up creating an html version but no slides.

Oh, looks like a copy of reveal.js is needed.

https://www.youtube.com/watch?v=hslrD0Y837c

going to be learning random graph theory this spring, maybe some random matrix theory

Cool.

Follow-up video to the prior one:
https://www.youtube.com/watch?v=ea7lJkEhytA

https://www.ams.org/journals/notices/201903/rnoti-p330.pdf

some figures missing from that version??

https://arstechnica.com/science/2019/11/a-personality-quiz-for-fans-of-math-and-history-are-you-a-newton-or-a-leibniz/

I am now HS Geometry revisiting.

take a look at the second volume in felix klein's 'elementary mathematics from a higher standpoint', his course for teachers of school mathematics!

https://www.springer.com/de/book/9783662494400

really enjoyed relearning HS geom for the GRE

https://www.nytimes.com/2020/02/05/science/quadratic-equations-algebra.html

https://www.poshenloh.com/quadraticdetail/

maybe ive just had the quadratics drilled into me very young, but his doesnt seem any more usable or memorable tbh

nice

smdh

it may be less useful for finding roots but it is also more useful for thinking about as a mental exercise, the sort in which considering an alternate solution to an established problem expands and sharpens one's mathematical reasoning skills.

this goes quickly from "WHAT IS GOING ON THE WORLD IS BROKEN" to "oh i know this"

https://www.youtube.com/watch?v=HJ_PP5rqLg0

good old Johnny Ball. he used to do this stuff on the tv when i was a kid.

how does the crossing out the even numbers bit work?

the binary thing is how you'd do multiplication in z80 assembly language where the instruction set only had addition and shifting (shiting right === integer division by 2)

yes, even numbers thing is a bit odd. it will map to the binary representation, but i'm not sure how yet

ah, odd just means that you have a remainder when dividing by 2

so his 121 = odd, even, even, odd, odd, odd

or, reading from bottom up, 1111001 = 64 + 32 + 16 + 8 + 1 = 121

(i can imagine trying to explain who johnny ball is to my younger colleagues in terms of being zoe ball's dad, only to then have to explain who zoe ball is)