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cs-401r:proofs [2014/09/05 14:10] ringger created |
cs-401r:proofs [2014/09/24 21:41] (current) cs401rPML Added link to example proofs page. |
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* Each step must also be justified. If you cannot provide a clear and convincing reason for a particular statement in your proof, then you need to give the matter further thought and consider adding additional steps to improve the argument. | * Each step must also be justified. If you cannot provide a clear and convincing reason for a particular statement in your proof, then you need to give the matter further thought and consider adding additional steps to improve the argument. | ||

* The last step is the conclusion, namely the statement which you set out to prove. | * The last step is the conclusion, namely the statement which you set out to prove. | ||

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+ | See the proofs on the [[example_proofs|example proofs page]]. | ||

A bad proof may have the following properties: | A bad proof may have the following properties: | ||

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* Any step is a simple expression with some value other than true or false. | * Any step is a simple expression with some value other than true or false. | ||

* Any step violates type constraints; e.g., a step that equates a number to a set cannot be valid. Use your mental type-checker! | * Any step violates type constraints; e.g., a step that equates a number to a set cannot be valid. Use your mental type-checker! | ||

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