Mathematical and Physical Journal
for High Schools
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Problem A. 638. (March 2015)

A. 638. Does there exist a simple, closed polyline in the 3-dimensional Cartesian co-ordinate system whose perpendicular projection onto every co-ordinate plane is a cycleless graph?

Proposed by: Imre Leader, Cambridge

(5 pont)

Deadline expired on April 10, 2015.


3 students sent a solution.
5 points:Williams Kada.
0 point:2 students.

Problems in Mathematics of KöMaL, March 2015