Has there been any work on homotopy Nambu brackets or even better on strong homotopy Nambu brackets?? Ordinary Nambu brackets appear most recently in work of Takhtajan.

We have convexity tag - it has empty tag wiki, but I understand the tag broadly as stuff related to convexity, convex functions, convex sets, etc. (Of course, for some of such questions convex-analysis or convex-geometry are more suitable.) For some time there was concavity tag, see here. The ta...

The tags on convexity are convex-geometry ($\times$560), convex-analysis ($\times$ 266), convexity ($\times$ 420). Here the number is the current (2019/02/23) number of uses and I ignore some more specific tags whose meaning is quite well-identified such as convex-polytopes or convex-optimization...