过份好问
发表于 2025-3-30 09:38:49
tion is composition: on strings, it connects the final point of the first string to the initial point of the second string..The quest for Kleene algebra in 2 dimensions starts with the clarification of the notions of word and composition in 2 dimensions. A 2-dimensional word is an arbitrary shape ar
并入
发表于 2025-3-30 13:48:59
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