In 1971, Nicaragua issued a set of ten stamps featuring The ten mathematical formulas that changed the face of the earth. These were 1 + 1 = 2, the Pythagorean law for right-angled triangles, Archimedes’ law of moments, Napier’s law of logarithms, Newton’s inverse-square law of gravitation, Maxwell’s law of electromagnetism, de Broglie’s law of light waves, Tsiolkovskii’s law of rocket motion, Boltzmann’s law of entropy, and Einstein law of relativity.
[Nicaragua 1971]
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