Recent content by ozarga

  1. O

    Help: If A[itex]\subseteq[/itex]B proof C-B[itex]\subseteq[/itex]C-A

    Thank you SammyS. I think I figured out: 1. A\subseteqB // hyp 2. x\inA \rightarrow x\inB // for element proof 3. x\notinB \rightarrow x\notinA // Contraposition 4. x\inBc\rightarrowx\inAc // Definition of Set Complement in 3 5. x\inC-B\rightarrowx\inC-A // Definition of Complement in...
  2. O

    Help: If A[itex]\subseteq[/itex]B proof C-B[itex]\subseteq[/itex]C-A

    Homework Statement Hello, I'm having problems with the following exercise from my homework. Proof that when A\subseteqB, then it happens that C-B\subseteqC-A Homework Equations The Attempt at a Solution This is how I have been trying to solve it: 1. A\subseteqB // Hyp 2...
Back
Top