/sci/ - Science & Math » Thread #12880970

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Nice trick!

Anonymous Thu 25 Mar 12:57:41 2021 No.12880970 View Reply Original Report

Quoted By: >>12880992 >>12881074 >>12881080 >>12882020 >>12882501

Anonymous

Anonymous Thu 25 Mar 2021 13:05:18 No.12880992 Report

Quoted By:

>>12880970
woman

Anonymous

Anonymous Thu 25 Mar 2021 13:42:13 No.12881074 Report

Quoted By:

>>12880970
What a "trick." Literally just the substitution x -> 1/x.

Anonymous

Anonymous Thu 25 Mar 2021 13:47:07 No.12881080 Report

Quoted By: >>12881225 >>12882043

>>12880970
This reminds me of a question that I was thinking about a few days ago. With programs like Mathematica and Symbolab for indefinite integrals and Python and MATLAB for definite/numerical integration, do people actually do integrals out by hand after they leave undergrad?

Anonymous

Anonymous Thu 25 Mar 2021 14:34:13 No.12881225 Report

Quoted By: >>12881921

>>12881080
You pretty much never need to evaluate them by hand.

The techniques for doing so are still useful to some degree, knowing how to manipulate them to arrive at an equation or to get some appropriate approximation is useful sometimes.

Anonymous

Anonymous Thu 25 Mar 2021 17:07:48 No.12881834 Report

Quoted By: >>12881923

Looks like something from a Michael Penn video.

Anonymous

Anonymous Thu 25 Mar 2021 17:23:46 No.12881921 Report

Quoted By:

>>12881225
There's value in doing them by hand. I did some research on resummations and noticed physishits were just copy pasting shit their mathematica code gave. I manually calculated the integrals and discovered an amazing symmetry that mathematica couldn't find. This allowed me to generalize results. Got a juicy publication out of it. Colleagues asked me how I figured it out. I said "shut up and calculate."

Anonymous

Anonymous Thu 25 Mar 2021 17:23:59 No.12881923 Report

Quoted By: >>12882020

>>12881834
It is, he posted it today
https://www.youtube.com/watch?v=JCuplIQ6JG4

Anonymous

Anonymous Thu 25 Mar 2021 17:25:19 No.12881927 Report

Quoted By:

That is unironically a neat trick

Anonymous

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Anonymous Thu 25 Mar 2021 17:45:27 No.12882020 Report

Quoted By:

>>12880970 >>12881923
>Nice trick!

Noice

Anonymous

Anonymous Thu 25 Mar 2021 17:49:02 No.12882043 Report

Quoted By:

>>12881080
only when deriving analytic solutions to problems. In ten years of PhD/postdoc/scientist employment, I've done this maybe a handful of times (and I'm working at the top of my field at Harvard)

Anonymous

Anonymous Thu 25 Mar 2021 19:17:40 No.12882501 Report

Quoted By:

>>12880970
but a=c is false, so what's the point?

Anonymous

Anonymous Thu 25 Mar 2021 19:20:01 No.12882510 Report

Quoted By: >>12882540

yeah, someone who talks about the beauty of math never had a diff course

Anonymous

Anonymous Thu 25 Mar 2021 19:25:24 No.12882540 Report

Quoted By: >>12882764

>>12882510
geometry is beautiful, math isn't

Anonymous

Anonymous Thu 25 Mar 2021 20:23:21 No.12882764 Report

Quoted By:

>>12882540
Go back

Anonymous

Anonymous Thu 25 Mar 2021 20:24:28 No.12882769 Report

Quoted By:

it's legitimately an interesting face ive never seen or heard of before

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