Further information about these and other mathematical stamps can be found in Robin J. Wilson’s book Stamping through Mathematics (Springer, New York, 2001) or in his Stamp Corners in The Mathematical Intelligencer.
Stamping through Mathematics
Further information about these and other mathematical stamps can be found in Robin J. Wilson’s book Stamping through Mathematics (Springer, New York, 2001) or in his Stamp Corners in The Mathematical Intelligencer.
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