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2007-01-21 01:41 David Eppstein 560×378×0 (3058 bytes) svg cleaning
2006-11-21 05:14 David Eppstein 256×256×0 (2814 bytes) A [[train track]] on a triple torus. Redrawn from the example shown in Penner and Harer, fig. 1.3.6. == References == *{{cite book | author = Penner, R. C., with Harer, J. L. | title = Combinatorics of Train Tracks | publisher = Princeton University P
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{{Information |Description=A train track on a triple torus. Redrawn from the example shown in Penner and Harer, fig. 1.3.6. |Source=Originally from [http://en.wikipedia.org en.wikipedia]; description page is/was [http://en.wikipedia.or