changed Joshua's "simple analysis" to "real analysis", the customary term in math
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The term "elementary proof" or "elementary techniques" in mathematics means use of only [[real numbers]] or simple analysis rather than the use of complex analysis.<ref>http://mathworld.wolfram.com/ElementaryProof.html</ref>
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The term "elementary proof" or "elementary techniques" in mathematics means use of only [[real numbers]] or real analysis rather than the use of complex analysis.<ref>http://mathworld.wolfram.com/ElementaryProof.html</ref>