Although the novel Frankenstein, written in 1818 by Mary Shelley, has been called the first science fiction novel, there is a persistent but false belief that women did not enter the field of science fiction writing until the 1960s and 1970s.
Other notable women in the science fiction field include:
... is called the discriminant of the quadratic equation, because it discriminates between three qualitatively different cases:
If the discriminant is zero, then there is a ...