partial differential equation

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noun Mathematics.

a differential equation containing partial derivatives.

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Origin of partial differential equation

First recorded in 1885–90

The problem is that partial differential equations — as essential and ubiquitous as they are in science and engineering — are notoriously difficult to solve, if they can be solved at all.
Latest Neural Nets Solve World’s Hardest Equations Faster Than Ever Before|Anil Ananthaswamy|April 19, 2021|Quanta Magazine
Despite the financial remedy, partial repeal of the screen quota has imperiled the domestic market.
Propaganda, Protest, and Poisonous Vipers: The Cinema War in Korea|Rich Goldstein|December 30, 2014|DAILY BEAST
Perhaps, like Hawking searching for his elegant equation, filmmakers will never find the answer.
Why Can’t Movies Capture Genius?|Clive Irving|December 14, 2014|DAILY BEAST
Or perhaps Understanding, Partial Ignorance, and Total Ignorance.
Extreme Weather? Blame the End Times|Jay Michaelson|November 28, 2014|DAILY BEAST

A better taxonomy would break us up by words like Acceptance, Partial Denial, and Total Denial.
Extreme Weather? Blame the End Times|Jay Michaelson|November 28, 2014|DAILY BEAST
Kundera sees fiction as a realm of many partial truths, its only certainty “the wisdom of uncertainty.”
The Birth of the Novel|Nick Romeo|November 27, 2014|DAILY BEAST
Granular and fatty casts, therefore, always indicate partial or complete disintegration of the renal epithelium.
A Manual of Clinical Diagnosis|James Campbell Todd
The 'whole' of him that now dealt with Lettice was far above all minor and partial means of knowing.
The Wave|Algernon Blackwood
Now the trouble with the main proposition just quoted is that each side of the equation is used as the measure of the other.
The Unsolved Riddle of Social Justice|Stephen Leacock
In other words, it is a truism, mere equation in terms, telling nothing whatever.
The Unsolved Riddle of Social Justice|Stephen Leacock
A record is generally kept of the number of nucleated red cells seen during a differential count of leukocytes.
A Manual of Clinical Diagnosis|James Campbell Todd