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With all due reverence towards Different,

September 28, 2012


PART respects differences.

Yay :-)


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From → Note to self

  1. Difference and Duality

    Dear All,

    There is a contrast between a map with a section and a map with a retract: in the case of a map with a section we can find proof [of belonging]; and in the case of a map with a retract we find that there is one proof.

    The contrast appears a little more pronounced: in trying to show that there is one proof f of h in r in the case of a map r with a section s, the closest I got is srf1 = srf2; and in trying to find proof of ‘h is in s‘ in the case of a map s with a retract r, the closest I got is srh.

    Is there a duality (knowing answer vs. knowing that there is one answer) in here?

    Please forgive me for rushing to ask for help if this is something that can become clear as I go through ‘The contravariant parts functor’ article (I’m still on the first page of the article in Conceptual Mathematics).

    Thank you,

    For admin and other information see:

  2. You actually make it appear so easy together with your presentation however I find this matter to be really something which I think I’d by no means understand. It kind of feels too complicated and very wide for me. I am having a look ahead for your subsequent submit, I’ll try to get the cling of it!

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