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The partial differential equation 2u_(tx)+u_xu_(xx)-u_(yy)=0.

The partial differential equation u_(tt)-u_(xx)-u+u^3=0.

The partial differential equation u_t=del ·(u^mdel u).

Let a space curve have line elements ds_N, ds_T, and ds_B along the normal, tangent, and binormal vectors respectively, then ds_N^2=ds_T^2+ds_B^2, (1) where ds_N^2 = ...

Differential calculus is that portion of "the" calculus dealing with derivatives. Among his many other talents, Major General Stanley in Gilbert and Sullivan's operetta the ...

Differential entropy differs from normal or absolute entropy in that the random variable need not be discrete. Given a continuous random variable X with a probability density ...

Differential evolution is a stochastic parallel direct search evolution strategy optimization method that is fairly fast and reasonably robust. Differential evolution is ...

The system of partial differential equations S_t=SxS_(xx).

An Abelian differential is an analytic or meromorphic differential on a compact or closed Riemann surface.

sum_(i=1)^n((partialu)/(partialx_i))^2=1.