@Canageek@cybre.space U+2297 ⊗ CIRCLED TIMES; pasting that symbol into wikipedia gets you https://en.wikipedia.org/wiki/Tensor_product
@Canageek@cybre.space wiktionary has more options if that's not right: https://en.wiktionary.org/wiki/%E2%8A%97
A small, community‐oriented Mastodon‐compatible Fediverse (GlitchSoc) instance managed as a joint venture between the cat and KIBI families.