Please help me to solve this problem. I've worked on it about a week or two. But it's very hard for me:if and prove that
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If then is , so that if is and then ... Kind regards
Originally Posted by havaliza Please help me to solve this problem. I've worked on it about a week or two. But it's very hard for me: if and prove that I suppose , so assume , which is a contradiction to , so we're done. Tonio
Originally Posted by tonio I suppose , so assume , which is a contradiction to , so we're done. Tonio Can I ask why ?
Originally Posted by havaliza Can I ask why ? Since .
another method : If , let since , but we have , a contradiction
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