A quantity 
is said to be less than 
if 
is smaller than
, written 
. If 
is less than or
equal to 
, the relationship
is written 
. In the Wolfram
Language, this is denoted Less[a,
b], or a < b.
If 
is much less than
, this is written 
. Statements
involving greater than and less than symbols are called
inequalities.
