Abstr@ct

$$\bullet:=\lnot\circ$$ $$\circ:=\lnot\bullet$$
$$\bullet\oplus\bullet=\bullet$$ $$\circ\oplus\circ=\bullet$$ $$\bullet\oplus\circ=\circ$$

$$\bullet\otimes\bullet=\bullet$$ $$\bullet\otimes\circ=\bullet$$ $$\circ\otimes\circ=\circ$$

  • comment

No comment found.

Add a comment

You must sign in to post a comment.