Examples of using One variable in English and their translations into Spanish
{-}
- 
                        Colloquial
                    
 - 
                        Official
                    
 
there must be at least one variable which appears with a non-zero coefficient in the selection equation
In the simple case of a function of one variable, say, h(x),
Evaluated at the roots of a monic polynomial P in one variable, they allow expressing the sums of the k-th powers of all roots of P(counted with their multiplicity)
including possible multicollinearity between the variables  or simply that one variable should not be included in the model.
these two rules are especially important when researchers want to estimate the effect of one variable on another.
the field of meromorphic functions is simply the field of rational functions in one variable over the complex field,
It is known that every finite group is realizable over any function field in one variable over the complex numbers C, and more generally over function fields in one variable over any algebraically closed field of characteristic zero.
in this article I will use time series with more than one variable, generated by systems with two
equipment for United Nations missions is the one variable in the United Nations financing picture.
A differentiable function of one variable is convex on an interval if
techniques acquired during previous studies of differential calculus in one variable, and to ensure all students acquire the necessary fluency
Emphasis will be put on the solid command of the basic skills in one variable, and the exposure to the new concepts in several variables 
such as the industry distribution of the payments and the fact that one variable in their computation, the import penetration ratio,
then tell them to Calculus: One Variable Calculus, with an Introduction to Linear Algebra v.1: One Variable Calculus, with an Introduction to Linear Algebra Vol 1 and Vol 2 y,
geometry by showing that a monic polynomial(an algebraic object) in one variable with complex number coefficients is determined by the set of its roots(a geometric object) in the complex plane.
One variable is expressed as an explicit effect due to certain causes;
change the value of one variable with another one  with Exchange or do it conditionally with CompareExcange,
Topic 1: DIFFERENTIAL CALCULUS OF ONE VARIABLE Learning time.
Only one variable matters.
Calculus of One Variable.