The function H is called a homotopy (in Y) between f and g.

Since actions are defined inductively, so is the function h, known as the order of the hierarchical complexity.

The function H is known as the Hamiltonian or the energy function.

This program is one of all the programs on which the halting function h is defined.

Sometimes the function H is expressed in terms of the probabilities of the distribution:

Any linear filter (such as a moving average) can be characterized by a function h(t) called its impulse response.

Hamilton's principal function S and classical function H are both closely related to action.

The function H is defined similarly for strong bases:

Similarly we can introduce a function h, etc.

That is why we might call the function h(x,y,z) the impulse response of free space propagation.