- #1
Adder_Noir
- 239
- 0
Hi,
Just reading through a good physics book about games and came across some stuff on complex numbers. The book states that the following statements are true.
i*j*k=-1
I have a problem with this one. Surely doesn't this mean the same as:
-1*sqrt(-1)=-1
or
-k=-1
How is minus one mulitplied by k equal to minus one when k is the square root of minus one?
It also states that:
ij=-ji=k
Which again I don't agree with. Surely i*j=-1 not k? Also why is the order important when they are all supposed to hold the same scalar value?
I should point out that this is for use with Quaternions but this part of the book makes no reference to that it's just describing complex numbers. Am I going mad or am I correct in my assumptions that these statements aren't true?
Many thanks
Just reading through a good physics book about games and came across some stuff on complex numbers. The book states that the following statements are true.
i*j*k=-1
I have a problem with this one. Surely doesn't this mean the same as:
-1*sqrt(-1)=-1
or
-k=-1
How is minus one mulitplied by k equal to minus one when k is the square root of minus one?
It also states that:
ij=-ji=k
Which again I don't agree with. Surely i*j=-1 not k? Also why is the order important when they are all supposed to hold the same scalar value?
I should point out that this is for use with Quaternions but this part of the book makes no reference to that it's just describing complex numbers. Am I going mad or am I correct in my assumptions that these statements aren't true?
Many thanks