The power series method can be applied to certain nonlinear differential equations, though with much less flexibility.

It is an overarching statement about the possible solutions for certain equations.

Most of these rules are now known as the proper way into solving certain equations.

They will if my answers to certain aerodynamic equations are correct.

He often proved that certain equations had no solution, which usually baffled his contemporaries.

You see that certain prearranged factors add up to a certain equation.

Galois had discovered new techniques to tell whether certain equations could have solutions or not.

I visualized certain equations in the papers Charles had transferred to my slate.

However rest mass is discouraged by some authors since it can be a misleading quantity to apply in certain equations.

For example, it arises as the point symmetry group of a certain ordinary differential equation.