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A singular point is any boundary point of the Disk that is not a regular point of the function.
What does it mean to simplify an algebraic expression?
It means to take the problem to the lowest point you can take it to.
Singular would be variety and plural would be varities.
Beniamino Segre has written:
'Lectures on modern geometry'
'The non-singular cubic surfaces' -- subject(s): Cubic Surfaces, Surfaces, Cubic
'Arithmetical questions on algebraic varieties' -- subject(s): Algebraic Geometry, Geometry, Algebraic
You could use a point on a graph as an algebraic term for the letter j OR! (i just found this answer) go to this link http://www.mathwords.com/jk/joint_variation.htm