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Compactness theorem
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==History== [[Kurt Gรถdel]] proved the countable compactness theorem in 1930. [[Anatoly Maltsev]] proved the uncountable case in 1936.<ref>[[Robert Lawson Vaught|Vaught, Robert L.]]: "Alfred Tarski's work in model theory". ''Journal of Symbolic Logic'' 51 (1986), no. 4, 869โ882</ref><ref>[[Abraham Robinson|Robinson, A.]]: ''Non-standard analysis''. North-Holland Publishing Co., Amsterdam 1966. page 48.</ref>
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