# What is rational integral function

The author of the book I am referring assumes two rational integral functions as shown below

$p_0\cdot x^n+p_1\cdot x^{(n-1)}+p_2\cdot x^{(n-2)}+...+p_n$

$q_0\cdot x^n+q_1\cdot x^{(n-1)}+q_2\cdot x^{(n-2)}+...+q_n$

Is this term old and he means real functions ?; if not, what is meant by rational integral function ?, rational function, integral function ?

• Probably just means "polynomial". Or maybe, "polynomial with rational coefficients". – Gerry Myerson May 10 '15 at 6:22
• @GerryMyerson, thankx – Vikram May 10 '15 at 6:25
• This book also defines the term to mean 'polynomial' books.google.ca/… – user142523 Nov 2 '17 at 22:15