2017-03-21 21:04:37 +0200 received badge ● Popular Question (source) 2017-02-10 15:31:17 +0200 asked a question non commutative multivariate Laurent polynomial ring How to write non commutative multivariate Laurent polynomial ring? 2017-02-01 18:47:38 +0200 asked a question I want product of the outgoing vertices as product of variables but it gives nonint type erros nonint error types: dia = DiGraph({'x0':{'x1':(1, -1),'y1':(1, -1),'x2':(1, -1)},'y2':{'x0':(1, -1),'x1':(1, -1)}}) diaout = dia.neighbors_out('x0');diaout prod(p for p in diaout) TypeError: can't multiply sequence by non-int of type 'str'\n"}︡{"done":true}︡  2014-08-20 19:07:38 +0200 received badge ● Editor (source) 2014-08-20 09:07:38 +0200 commented question Create an alternative: W(E8) act on positive roots to get some roots yes it works for A4 or A6 or A8 . E8 is too big 2014-08-20 09:01:58 +0200 answered a question Create an alternative: W(E8) act on positive roots to get some roots yes it works for A4 or A6 or A8 . Yah E8 it too big 2014-08-17 19:13:57 +0200 asked a question Create an alternative: W(E8) act on positive roots to get some roots W=WeylGroup(['E',8]) R = RootSystem(['E',8]).root_lattice() alpha = R.simple_roots();alpha [w for w in W if w.action(alpha[1])==(alpha[1]+alpha[2])] Output shows : gap: cannot extend the workspace any more! *Is their any alternative calculation to simplify the above *