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Assigned Tuesday March 15; due Thursday March 24, 3PM, in class

this document in PDF: HW.pdf

**Required reading. ** Read, reread and rereread
your notes to this point, and make sure that you really, really really,
really really really understand everything in them. Do the same every
week! Also, read Hatcher's pages 134-155 and 166-176.

**Solve the following problems. ** (But submit
only the underlined ones). In Hatcher's book, problems __3__, 4, 8, 9
(__a__, b, c, __d__), 12, 14, __28__ and 32.
on pages 155-159.

**Just for fun. ** Remember the connected sum
operation from our quick discussion of surfaces? Prove that
the connected sum
of three copies
of the projetive plane
is homeomorphic to the connected
sum
of a single projective plane
and
single torus .

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Dror Bar-Natan 2005-03-14