{"type":"rich","version":"1.0","title":"Exactness criterion for a first-order differential equation","html":"<span class=\"wb-embed wb-embed-math\" data-latex=\"\\frac{\\partial M}{\\partial y}=\\frac{\\partial N}{\\partial x}\\ \\Longrightarrow\\ M(x,y)\\,dx+N(x,y)\\,dy=0\\ \\text{is exact}\">\\frac{\\partial M}{\\partial y}=\\frac{\\partial N}{\\partial x}\\ \\Longrightarrow\\ M(x,y)\\,dx+N(x,y)\\,dy=0\\ \\text{is exact}</span>","width":640,"height":320}