Math Is Fun Forum

mrpace

Member

Registered: 2012-08-16

Posts: 88

The definition of ''or'' when sketching a set

z is the set where Re(z)<1 or Im(z-1) does not equal zero.

so my question is when they say ''or'', do they also mean the points that satisfy both sets or does ''or'' mean exclusive to one set?

anonimnystefy

Real Member

From: Harlan's World

Registered: 2011-05-23

Posts: 16,049

Re: The definition of ''or'' when sketching a set

In all of mathematics, "or" usually signifies what would be often denoted as "and/or", so in this case z is something that satisfies at least one of those constraints.

---

“Here lies the reader who will never open this book. He is forever dead.
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.