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nikol


Total Posts: 850
Joined: Jun 2005
 
Posted: 2019-11-14 11:52
Must be very handy...

https://arxiv.org/abs/1908.03795

Discoveries are still made.

I got it from this article
https://www.quantamagazine.org/neutrinos-lead-to-unexpected-discovery-in-basic-math-20191113/

mtsm


Total Posts: 239
Joined: Dec 2010
 
Posted: 2019-11-27 18:25
Saw that, quite romantic I must say...

nikol


Total Posts: 850
Joined: Jun 2005
 
Posted: 2019-11-27 18:48
Forgot to update. Thanks.

It appears that this result is known
(in russian): "Calculation of eigenvalues and eigenvectors in mesh-type problems (Algorithms and error estimations)" (1986)
http://math.ucdenver.edu/~aknyazev/research/papers/old/k.pdf

and there the following is referenced:
"Error bounds in Rayleigh-Ritz approximation of eigenvectors" (1934)
https://pdfs.semanticscholar.org/dd58/71b7a8e6c07071bc04e483c09841919f80e3.pdf

so, thanks to social media for popping up the subject

zee4


Total Posts: 67
Joined: May 2010
 
Posted: 2019-11-27 21:22
Did he write the equations by hand? Or is it 80's LaTeX?

Бухарский

nikol


Total Posts: 850
Joined: Jun 2005
 
Posted: 2019-11-27 21:55
As far as I remember 90% of university preprints in soviet times were with handwriting formulas.
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