# Set Theory Results

Consider that , and are the sets, then

**1.** and

**2.**

**3.**

**4.** and then

**5.** if and only if

**6.** if and only if

**7.** and

**8.** If and then

**9.**

**10.**

**11.**

**12.** and

**13.**

**14.**

**15.** If then

**16.** If and then

**17.** If or then

**18.**

**19.**

**20.**