"Mathematics is a language, and as such, it is coded (made up of conventions). This explains why math is the only science which allows for 'proof.' But some mathematical conventions are unprovable. For example, there is no mathematical proof that multypling two negatives equates to a positive result, of that the multiplication of a positive and a negative results in a negative (proof only exists to demonstrate two poitives create a positive when multiplied with each other). This cannot be mathematically proven, ..."

Of course they can be proven. Go see a math professor or buy a good math book with proofs. (btw, math is not a science -- just a language that is useful in science.)

Permit me to show that (-1) x (+1) = -1:

1) let A = -1

2) then (A/A) = +1

3) thus (-1)/(-1) = +1

4) after multiplying both sides by (-1) yields (-1) = (-1) x (+1) 

5) since also (-2) = (-1) x (+2) and (-n) = (-1) x (+n) we can therefore conclude that any positive number when multiplied by a minus 1 will yield a negative answer.

Also, taking the result (-1) = (-1) x (+1),
we can divide both sides by (-1) to obtain (-1/-1) = (-1/-1) x (+1), thus (+1) = (+1) x (+1) or 1=1, which confirms the proof.

"We have seen the enemy, and he is us!" (POGO)
Edited 5 times by dg May 14 11 12:30 PM.