Biquadratic variation of potential
coefficient of variation of grade
equation of variation of energy
method of variation of constant
method of variation of parameters
the equation of variation of energy
doctrine of distribution of the burden of proof
law of distribution of velocities
potential of distortion
prediction of potential distribution
regularities of distribution of human error
Rule of distribution of practice
Spatial distribution of φ-potential
theory of distribution of functional value
uneven coefficient of potential distribution
adaptive to variation of flow variables