Fei Wang

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13 years, 237 days

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These are questions asked by Fei Wang

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I meet a problem. When I use command "if" in command "for", there is nothing.I don't know reason. Can anyone tell me the reason?

Giving a expression as follows, how to extract  powers of g to a list?

 In this example the list of powers of g is {2,1,2}

6*F*u[0, x]*g[x, x]*g^2+24*F*u[0]*g[x]^3-18*F*u[0]*g[x]*g[x, x]*g+2*F*u[0]*g[x, x, x]*g^2

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