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    First Order Peano Arithmetic (FOPA) Question

    Hello, Can someone please please please help me on this question, a friend of mind in uni totally can't do it and she has an exam this thursday and she needs to learn how to do it to help her prepare for the exam. Can someone do this question to help her ? Let A be a sentence of First...
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    Prove that if |A| ≤ |B| and |B| ≤ |C| then |A| ≤ |C|

    Oh so it is different, can you please show me the proof ? Because I have absolutely no idea. This question was given to me by a friend of mine and she doesn't know how it is done as well. :-(. If you can help me, I wolud be very appreciated.
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    Prove that if |A| ≤ |B| and |B| ≤ |C| then |A| ≤ |C|

    If this is the case, would the proof be any different from the proofs given by the posts above? Also, thanks everyone for the help so far.
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    Prove that if |A| ≤ |B| and |B| ≤ |C| then |A| ≤ |C|

    Hello, Can someone help me on this question please ? Prove that if |A| ≤ |B| and |B| ≤ |C| then |A| ≤ |C| Thanks in advance.
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