solve equation system with dsolve

2021 3 4

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I am trying to solve a differential equation system with the command dsolve, but the answer is empty sym

I wrote this

syms x y

a = 0.1, b=0.2;

s = dsolve ('Dx=-a*x*y','Dy=-b*x*y','t')

an the system I want to solve is this

dx/dt=-axy

dy/dt=-bxy

thanks

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Star Strider 2021-3-4

It is a system of nonlinear differential equations. Only a few nonlinear differential equations have analytic solutions. These are not among them.

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