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</head><body><p><span style="color: rgb(51, 51, 51); font-family: helvetica, arial, sans-serif; font-size: 12pt; background-color: transparent;">Not exactly a rigorous mathematical proof, but it gets the point across.</span><br></p><p><span style="color: rgb(51, 51, 51); font-family: helvetica, arial, sans-serif; font-size: 12pt; background-color: transparent;"><br></span></p><p><span style="color: rgb(51, 51, 51); font-family: helvetica, arial, sans-serif; font-size: 12pt; background-color: transparent;">https://twitter.com/SciencePorn/status/784649143314677760?t=1&cn=ZmxleGlibGVfcmVjc18y&refsrc=email&iid=fda1d65edbea4a47acf27f891715aa18&uid=2828723295&nid=244+289476608</span></p></body></html>