Equations for Valentines
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This Demonstration shows four different heart-shaped algebraic surfaces.
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Contributed by: Michael Croucher (March 2011)
After work by: Eric W. Weisstein and Michael Trott
Open content licensed under CC BY-NC-SA
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"Equations for Valentines"
http://demonstrations.wolfram.com/EquationsForValentines/
Wolfram Demonstrations Project
Published: March 7 2011