How can suppose, let, and consider be used in proof writing?

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SUMMARY

The discussion focuses on the usage of the terms "suppose," "let," and "consider" in mathematical proof writing. These terms are not used randomly; they serve to establish hypotheses clearly. Each term can introduce a statement effectively, as demonstrated by examples involving the Pythagorean theorem. Understanding the nuances of these words enhances clarity and precision in mathematical arguments.

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Homework Statement


This isn't a homework problem, but I just had a general question about the language of writing proofs. I often see words like "suppose", "let", and "consider" in proofs. Could someone explain to me if there are rules to applying these? It doesn't seem like they are just randomly thrown into start off a proof.


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The Attempt at a Solution

 
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I don't know of any formal rules. English has a lot of flexibility. All three of those words could be used to accomplish the same thing:

Suppose A is a right triangle, then the Pythagorean theorem...

Let A be a right triangle, then the Pythagorean theorem...

Consider a right triangle A. The Pythagorean theorem...

They all three serve to establish the hypothesis that A is a right triangle.
 

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