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The monarch butterfly or simply monarch ( Danaus plexippus) is a milkweed butterfly ( subfamily Danainae) in the family Nymphalidae. [6] Other common names, depending on region, include milkweed, common tiger, wanderer, and black-veined brown. [7] It is among the most familiar of North American butterflies and an iconic pollinator, [8] although ...
Statement. The problem asks if it is possible to color each of the positive integers either red or blue, so that no Pythagorean triple of integers a, b, c, satisfying are all the same color. For example, in the Pythagorean triple 3, 4 and 5 ( ), if 3 and 4 are colored red, then 5 must be colored blue.