Define an injective map without using the axiom of choice. I would define an injective function by , where if and if . But how would I define the map without using the axiom of choice?
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Originally Posted by dori1123 Define an injective map without using the axiom of choice. I would define an injective function by , where if and if . But how would I define the map without using the axiom of choice? If let If let If let
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. But how would I define the map without using the axiom of choice?
Originally Posted by dori1123 
