From: Michael Orlitzky Date: Mon, 1 Mar 2021 03:20:13 +0000 (-0500) Subject: eja: update the TODO. X-Git-Url: https://gitweb.michael.orlitzky.com/?a=commitdiff_plain;h=7bb608efc474092b1c26286924c8d91a1bf51aaa;p=sage.d.git eja: update the TODO. --- diff --git a/mjo/eja/TODO b/mjo/eja/TODO index 90a49d3..f27df9c 100644 --- a/mjo/eja/TODO +++ b/mjo/eja/TODO @@ -2,7 +2,8 @@ 2. Add references and start citing them. -3. Implement the octonion simple EJA. +3. Implement the octonion simple EJA. We don't actually need octonions + for this to work, only their real embedding (some 8x8 monstrosity). 4. Pre-cache charpoly for some small algebras? @@ -14,3 +15,8 @@ sage: a0 = (1/4)*X[4]**2*X[6]**2 - (1/2)*X[2]*X[5]*X[6]**2 - (1/2)*X[3]*X[4]*X[6 5. Profile the construction of "large" matrix algebras (like the 15-dimensional QuaternionHermitianAlgebra(3)) to find out why they're so slow. + +6. Instead of storing a basis multiplication matrix, just make + product_on_basis() a cached method and manually cache its + entries. The cython cached method lookup should be faster than a + python-based matrix lookup anyway.