One stanza in the poetry of mathematics br Speaks of butterflies and building clouds, br Of reasoning toward a chasm, of quantifying chaos: br br For, as a system becomes increasingly complex, br Small variations in data inputs over time will yield br Huge fluctuations in results, so that ultimately br br A butterfly beats its wings in China and br Causes a storm to arise in the Atlantic br (Of which the butterfly is blissfully unaware) . br br The poetry of mathematics does not speak br Of butterfly conscience, sympathy, or dread; br It does not deal with the romance of clouds.