Reputation
2,940
Top tag
Next privilege 3,000 Rep.
Cast close & reopen votes
Badges
6 32 70
Impact
~288k people reached

Sep
20
comment Prove that $(\mathbb{R}\setminus \{0\},\sim):= ab>0$ is transitive.
Ah. For whatever reason I had not considered multiplying them together. I had thought of dividing them out, but was getting nowhere that way.
Sep
20
asked Prove that $(\mathbb{R}\setminus \{0\},\sim):= ab>0$ is transitive.
Sep
19
asked How do I prove that a multi-part function is injective and/or surjective?
Sep
19
accepted Show that $A\setminus (B\setminus C)=(A\setminus B)\cup(A\cap B\cap C)$
Sep
19
comment Show that $A\setminus (B\setminus C)=(A\setminus B)\cup(A\cap B\cap C)$
I vaguely recall this from some years ago -- what is this property/equality/law called? I'm referring to the addition of $B$ and $\overline{B}$ to both sides of a union
Sep
19
asked Show that $A\setminus (B\setminus C)=(A\setminus B)\cup(A\cap B\cap C)$
Sep
16
awarded  Popular Question
Sep
9
awarded  Popular Question
Sep
8
awarded  Yearling
Aug
5
awarded  Famous Question
May
28
awarded  Notable Question
May
23
awarded  Popular Question
Apr
26
awarded  Notable Question
Apr
23
awarded  Notable Question
Apr
23
awarded  Famous Question
Apr
19
awarded  Popular Question
Apr
16
awarded  Famous Question
Apr
3
awarded  Popular Question
Mar
28
awarded  Notable Question
Mar
16
awarded  Popular Question