smbelcas > notebook > projects > Y x I twist

Project info
Y x I twist
Y x I twist cowl by sarah-marie belcastro
Knitting
Needles & yarn
US 7 - 4.5 mm
Malabrigo Yarn Merino Worsted
0.35 skeins = 73.5 yards (67.2 meters), 35 grams
Notes

This is an instantiation of an image on page 52 of Allen Hatcher’s Algebraic Topology. (You can download this
book for free.) Here’s how to construct it: Start with the Cartesian product Y × I. Now rotate one end by 1/3 and glue it to the other end. The resulting object has only one boundary and is not a manifold.

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Finished
March 17 2012
April 1 2012
 
About this pattern
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10 projects, in 37 queues
About this yarn
by Malabrigo Yarn
Aran
100% Merino
210 yards / 100 grams
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  • Project created: March 18, 2012
  • Finished: April 1, 2012
  • Updated: November 13, 2012
  • Progress updates: 4 updates