Also known as C-2
C2 or a derivative (C-2, C2, etc.) may refer to:
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C2 or a derivative (C-2, C2, etc.) may refer to:
==Mathematics and physics== C2, one of the common notations for the cyclic group of order 2 C2 differentiability class C2 or \Complex^2, the complex coordinate plane c2 the square of the speed of light (in the mass–energy equivalence formula) C2 (space group), three-dimensional space group number 5
Excerpted from Wikipedia’s “C2” article, available under the CC BY-SA 4.0 licence.