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| {\em Wikipedia} is a free online encyclopedia that anyone may edit. Its coverage of elementary mathematical topics is almost \PMlinkescapetext{complete}, and its coverage of intermediate and advanced topics is adequate. Wikipedia has articles on the integers in the \PMlinkescapetext{range} $-2 < n < 201$ as well as 220, 284, 496, 666, 720, 1138, 1729, 69105 and certain powers of ten. Its biographical coverage of the most famous mathematicians and physicists (Einstein, Gauss, Ramanujan, Wiles, etc.) is on par with that of the best paper encyclopedias, and there is often at least a couple of lines of information on the more obscure mathematicians. |
{\em Wikipedia} is a free online encyclopedia that anyone may edit. Its coverage of elementary mathematical topics is almost \PMlinkescapetext{complete}, and its coverage of intermediate and advanced topics is adequate. Wikipedia has articles on the integers in the \PMlinkescapetext{range} $-2 < n < 201$ as well as 220, 284, 496, 666, 720, 1138, 1729, 69105 and certain powers of ten. Because anyone may edit Wikipedia and introduce intentional or unintentional computational errors, it is advisable to double-check or recalculate any number from Wikipedia before using it in any intensive calculations. Unlike PlanetMath, Wikipedia does not use the Mathematics Subject Classification codes to organize its entries on mathematical topics; however, the PlanetMath Exchange does use the MSC codes to co\"ordinate exchange between PlanetMath and Wikipedia. This would seem to reveal the same \PMlinkescapetext{deficiencies} as PlanetMath, but Wikipedia has articles on those topics from a more physics-oriented standpoint. |
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| Because anyone may edit Wikipedia and introduce intentional or unintentional computational errors, it is advisable to double-check or recalculate any number from Wikipedia before using it in any intensive calculations. Unlike PlanetMath, Wikipedia does not use the Mathematics Subject Classification codes to organize its entries on mathematical topics; however, the PlanetMath Exchange does use the MSC codes to co\"ordinate exchange between PlanetMath and Wikipedia. This would seem to reveal the same \PMlinkescapetext{deficiencies} as PlanetMath, but Wikipedia has articles on those topics from a more physics-oriented standpoint. |
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