If ep = dQ/dP.P/Q = infinity, the demand is perfectly elastic.
Both positive and negative infinity are equally valid mathematical entities.
infinity
Infinity is a sophisticated mathematical concept and there are highly evolved rules for manipulating quantities with are or which can become infinite.In the absence of a context, simple questions such as "infinity minus infinity" can not be answered. In mathematical and physical situations where such questions arise, there is normally a completely rational and prescriptive way to arriving at an answer.
mathematical phrase
No, infinity is not a number, in the mathematical sense. It is a symbol for "unlimited". As such it has uses in various theories in math and in physics. The simplest proof is adding a real value, such as 1, to infinity. Just as zero times any number is still zero, infinity plus any value will remain "infinity".
Infinity cannot, by definition, be a defined number such as zero.
Yes and no. Technically, infinity cannot be negative because it is an idea, not a number, but negative infinity is used in several mathematical equasions
Infinity was not created as it does not exist as a discrete number but as a mathematical hypothesis to define chaos by mathematicians in antiquity.
There is no way to arrive at any mathematical result for the product of zero and infinity; it is a meaningless expression.
The mathematical symbol for "undefined" is the infinity symbol.
The Webster's definition of infinity is an endless amount. The Webster's definition of uncountable is inconceivably numerous. However, infinity is the proper term to be used in mathematics.