| 21. | Anatoly Maltsev gave necessary and sufficient conditions for embeddability in 1937.
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| 22. | The third statement gives a necessary and sufficient condition concerning stability.
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| 23. | It basically consists in confusing a necessary with a sufficient condition.
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| 24. | The Combinatorial Riemann Mapping Theorem gives necessary and sufficient conditions for this to occur.
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| 25. | I wonder if anyone knows a necessary and sufficient condition?
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| 26. | In addition, the following sufficient conditions for a class to be tame are known:
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| 27. | NPOV-i . e . that reliable sources are not a sufficient condition for inclusion.
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| 28. | However, several necessary conditions and several sufficient conditions are known.
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| 29. | But this is a required condition, not a sufficient condition.
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| 30. | A number of sufficient conditions for unique decodability are known.
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