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2015-06-06 12:45:46 +0200 | answered a question | Dimensions of modules in branching |
2015-06-03 16:55:46 +0200 | asked a question | Dimensions of modules in branching For example, consider the following branching: How can I find the dimensions of all representations that occur? In this example, we obtain: and I would like to get: (Note: If I try A1(1).degree() I obtain 1 which is wrong.) |
2013-04-01 16:13:29 +0200 | received badge | ● Editor (source) |
2013-04-01 15:02:03 +0200 | commented question | epsilon basis for roots (was graph edge labels) No the labels are in $\alpha$-notation in SAGE. The matter is a bit more complicated since the $\epsilon$-notation has to be computed from the $\alpha$-notation. It;s just a different notation really. The problem is, that there's no $\epsilon$-notation in SAGE, since the ambient space for RootSystem is implemented via tuples of numbers. |
2013-04-01 11:43:19 +0200 | asked a question | epsilon basis for roots (was graph edge labels) I need an illustration of some (sub)poset of positive roots. I have a working code that produces correct labels, but they are written as sums of simple roots. I.e. the resulting graph (when exported to LaTeX) has labels such as $\alpha_1 + \alpha_2$. I would like to have these labels in $\epsilon$-notation. I.e. the previous example would read $\epsilon_1 - \epsilon_3$. RootSystem has an ambient_space method that provides an access epsilon basis, but
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