Set symbolic variables constant in plot
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I have the symbolic function
f = 2*a^2*b^2 - 2*a^2*b + 5*a^2 - 2*a*b^3 - 2*a*b^2*c
and want to see a surface plot of this for c = 0.
I imagine I want to use the ezsurfc() function but how do I specify that I want to hold the symbolic variable 'c' constant and equal to 0?
Many thanks, Rob