The general word goes back to Greek κάκ τος ‘prickly plant’ via Latin cactus ‘cardoon’. As a mathematical term, it was first used by Harary and Uhlenbeck (1953, p. 315).

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  • Holger Becker

摘要

The general word goes back to Greek κάκ τος ‘prickly plant’ via Latin cactus ‘cardoon’. As a mathematical term, it was first used by Harary and Uhlenbeck (1953, p. 315).