I am reading the book "Multiple input describng functions and nonlinear system design" written by A.Gelb and W.E.Vander Velde.
At some point it says:
Single-valued characteristics are termed memoryless; multivalued characteristics are said to possess memory.
I am a bit confused about the meaning of the 'memoryless' term. I thought that memoryless meant a function that depends only on the value at that time instant and not at previous instants of time.
What am I missing?