| 21. | Dilworth's theorem follows as a corollary of this result.
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| 22. | However, by Hurwitz's theorem they are the only ones.
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| 23. | In two dimensions, it is equivalent to Green's theorem.
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| 24. | Earnshaw's theorem forbids magnetic levitation in many common situations.
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| 25. | Another simple proof of Putnam's theorem is as follows:
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| 26. | Bell's theorem rules out any local hidden variable theory.
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| 27. | This is a parallelism of L�b's theorem for reasoners.
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| 28. | So Euler's theorem yields, and we get 7 222.
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| 29. | It is called the Gelfond conjecture or Baker's theorem.
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| 30. | With this remark Froda's theorem takes the stronger form:
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