positive definite

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(of a quadratic form) positive for all real values of the variables, where the values are not all zero.

(of a matrix) displaying the coefficients of a positive definite quadratic form.

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On the farm, the feed for chicks is significantly different from the roosters’; ______ not even comparable.

First recorded in 1905–10

positive definiteness, noun

There was a lot of positive feedback from people interested in non-gender binary people.
Grindr’s Trans Dating Problem|David Levesley|January 9, 2015|DAILY BEAST
But he, like many people using dating apps whatever their sexual identity, remains stoutly positive.
Grindr’s Trans Dating Problem|David Levesley|January 9, 2015|DAILY BEAST
And the fact that satire unnerves the intolerant is evidence of its positive power.
Why We Stand With Charlie Hebdo—And You Should Too|John Avlon|January 8, 2015|DAILY BEAST
Do you think that as we get older our thoughts shift to the more abstract, the music, than the definite, the lyrics?
Belle & Sebastian Aren’t So Shy Anymore|James Joiner|January 7, 2015|DAILY BEAST

The trials produced positive results, published in The New England Journal of Medicine in November.
The Race for the Ebola Vaccine|Abby Haglage|January 7, 2015|DAILY BEAST
Aguinaldo withheld his decision until Paterno could report to him the definite opinions of his generals.
The Philippine Islands|John Foreman
Quantitative estimation does not furnish much of definite clinical value.
A Manual of Clinical Diagnosis|James Campbell Todd
That she had her definite reason he knew, as a woman knows when another woman is wearing a last year's gown.
Bella Donna|Robert Hichens
He was positive he had seen some one enter the room, go to the chair, and take the money from his pockets.
The Homesteader|Oscar Micheaux
He even fancied that something of challenge flashed from her, though without definite words or gesture.
The Wave|Algernon Blackwood