mforbes's profile - activity

2022-10-26 01:03:17 +0200	received badge	● Notable Question (source)
2021-05-14 14:22:53 +0200	received badge	● Popular Question (source)
2020-06-07 12:40:20 +0200	received badge	● Student (source)
2020-06-06 10:59:53 +0200	received badge	● Editor (source)
2020-06-06 10:59:34 +0200	commented question	How to simplify dirac_delta? Ah, sorry, that is a feature of https://doc.cocalc.com/sagews.html (Sage worksheets) on CoCalc. It is the same thing. I will remove it.
2020-06-06 08:16:37 +0200	asked a question	How to simplify dirac_delta? Various manipulations are possible with `dirac_delta` and its derivatives. How can I teach sage to simplify these? For example, the following Green's function for a free particle in 1D could simplify to simply `dirac_delta(x)`: `sage: var('x,k') sage: G = heaviside(x)sin(kx)/k sage: simplify(k*2G + diff(G, x, x)) 2cos(kx)dirac_delta(x) + sin(kx)diff(dirac_delta(x), x)/k` How can I teach sage to perform the following simplifications `f(x)dirac_delta(x) -> f(0)dirac_delta(x) f(x)diff(dirac_delta(x),x) -> diff(f(x), x)dirac_delta(x) -> diff(f(x), x).subs(x=0)dirac_delta(x)` which would bring the answer into the desired form `dirac_delta(x)`?
2019-02-04 20:02:27 +0200	commented answer	Is there a way to store and sync the files from sage cloud on local hard drive? Note: Dropbox no longer supports appropriate drive formats to allow it to work with CoCalc. See https://github.com/sagemathinc/cocalc/issues/11 (issue 11) for details.