The natural domain of a formula is the set of values for which it is defined, typically within the reals but sometimes among the integers or complex numbers. For instance the natural domain of square root is the non-negative reals when considered as a real number function. When considering a natural domain the set of possible values of the function is typically called its range.
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Famous quotes containing the words natural and/or domain:
“Man is, then, only disguise, falsehood, hypocrisy—both in himself and in regard to others. He does not wish any one to tell him the truth; he avoids telling it to others; and all these dispositions, so removed from justice and reason, have a natural root in his heart.”
—Blaise Pascal (1623–1662)
“No domain of nature is quite closed to man at all times.”
—Henry David Thoreau (1817–1862)