what are the basic terms used to indicate logical alternatives. For example: converse, contrapositive, negation.

Question

what are the basic terms used to indicate logical alternatives.  For example: converse, contrapositive, negation.

anonymous · Answer

You mean symbols?

amistre64 · Answer

symbols I pretty much undertand ... maybe :)

im thinking more of terminology and examples such as:

p -> q , the contrapositive is;  -q -> -p

anonymous · Answer

Like rules of inference..?

anonymous · Answer

Implication, contraposition, equivalence etc...

amistre64 · Answer

those sound about right, the 1st chapter in my discrete math text is on logic and building truth tables and contorting ps and qs ...

anonymous · Answer

truth tables are fun

anonymous · Answer

Implication, contraposition, equivalence

Simplification, combining,Addition, conjunction disjunction, transitivity

Think that's all of them..

amistre64 · Answer

does anyone recall the "pedmas" of logic symbols?

anonymous · Answer

What's that? For a well formed formula?

amistre64 · Answer

order of operations .... i believe

anonymous · Answer

and before or

anonymous · Answer

ABC + CDE

anonymous · Answer

amistre64 · Answer

i believe it goes:

1. - , negation
2. n , and (akin to multiplication)
3. u , or (akin to addition)
4. -> , conditional
5. <->, biconditional

anonymous · Answer

Couple more on there...

anonymous · Answer

Meaning u are supposed to rewrite an expression following that order..?

anonymous · Answer

Everybody uses brackets..

anonymous · Answer

I think he meant
A  or B and C
(A or B) and C   or  A or(B and C)

anonymous · Answer

Those are rules of Boolean algebra

anonymous · Answer

Commutative, Associative, Distributive etc.

anonymous · Answer

Anyway, brackets just like normal math is better..

anonymous · Answer

anonymous · Answer

truth tables are fun????

anonymous · Answer

Heh..:-)

anonymous · Answer

why not?

anonymous · Answer

anonymous · Answer

riding a bike is fun.  going out with women is fun.  skiing i hear is fun. also scuba diving. i even think crosswords are fun.  but truth tables????

anonymous · Answer

u missed soduko

anonymous · Answer

i used to think they were fun but there is a certain sameness to them after a while
so i got bored and stopped