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3 votes

A quadratic $O(N)$ invariant equation for 4-index tensors

Perhaps I might add a few more comments related to my work with Andy Stergiou, in particular that related to archive 2010.15915 where we discussed in some detail various examples for N up to 7. For N=...
13 votes
Accepted

A quadratic $O(N)$ invariant equation for 4-index tensors

Well, this is not actually an answer to either of the OP's questions; at most, it provides an easier way to classify the solutions for the $n=3$ case, and that might point a way towards an analysis ...
4 votes

Partition of polygons into 'strongly acute' and 'strongly obtuse' triangles

It is, indeed, true that if we have a polygon that can be partitioned into $120^\circ$-obtuse triangles, then at least one angle of the original polygon exceeds $120^\circ$. However we may need extra ...
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2 votes

Partition of polygons into 'strongly acute' and 'strongly obtuse' triangles

It is not the case that all strongly obtuse subdivisions with a threshold over $120^\circ$ are possible through vertex-to-vertex connections. Consider the following dissection of a pentagon into ...

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