Talk:PROP (category theory)
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References
Do you have references for this definition? Isn't it due to Mac Lane? Thank you. --Sam Staton 18:31, 12 May 2007 (UTC)
- You're right it's due to MacLane. I've added a precise reference. Samuel Mimram 21:15, 10 August 2007 (UTC)
Examples
Are the five examples given PROBs, PROPs ?
What about natural numbers and surjections ?
Examples of PROPs which are not PROBs, and PROBs which are not PROs ? —Preceding unsigned comment added by 98.207.113.206 (talk) 08:43, 6 May 2010 (UTC)