## 75 Reputation

6 years, 210 days

## @vv How can I get rid of this probl...

@vv How can I get rid of this problem?

## @Carl Love thank you very much...

@Carl Love thank you very much

## Norm2 := proc (u) local x, y; z, (int(u(...

Norm2 := proc (u) local x, y; z, (int(u(x, y, z)^2, [x = -Pi .. Pi, y = -Pi .. Pi, z = -Pi .. Pi]))^(1/2) end proc;
proc(u)  ...  end;
a1 := simplify(Norm2(u1)/Norm2(u0));
Error, (in simplify/recurse) ambiguous multiple assignment

why this error?

## @vv Thank you very much ...

@vv Thank you very much

## @vv thank you, but why? a := -0.3...

@vv thank you, but why?

a := -0.39323780;
u1 := proc (x, y) options operator, arrow; 1-exp(a*x)*cos(2*Pi*y) end proc;

u2 := proc (x, y) options operator, arrow; a*exp(a*x)*cos(2*Pi*y) end proc;

Norm2 := proc (u) options operator, arrow; (int(u^2, -.5 .. 1.5, -.5 .. 1.5))^(1/2) end proc;

simplify(Norm2(u2)/Norm2(u1));

.4266633682*sqrt(int(u2^2, [-.5 .. 1.5, -.5 .. 1.5]))

## @Mariusz Iwaniuk thank you very muc...

@Mariusz Iwaniuk thank you very much

## @acer thank you very much ...

@acer thank you very much

## @Rouben Rostamian  I am saving as E...

@Rouben Rostamian  I am saving as EPS, but it does not appear from the graphic only Axes

## @Rouben Rostamian  I need transfer ...

@Rouben Rostamian  I need transfer this figure

 > restart;
 > kernelopts(version);

 > f := proc(x, y) options operator, arrow; sin(x)*cos(y) end proc:
 > Psurf:=plot3d(f, -Pi..Pi, -Pi..Pi, style=surface,
 > Pcont2D_1:=plots:-contourplot(f, -Pi..Pi, -Pi..Pi,
 > coloring=["Orange","Blue"],                               style=line):
 > Proj:=plottools:-transform((a,b)->[a,b,-1]):
 > plots:-display(
 > Psurf,
 > Proj(Pcont2D_1)
 > );

 >

## @Rouben Rostamian  if figure is thr...

@Rouben Rostamian  if figure is three dimension?

## @acer Thank you very much,...

@acer Thank you very much,

## I used maple 18 , when i used this code ...

I used maple 18 , when i used this code ,the project of contourplot is invisible in the figure,why?

## Thank you very much,    ...

Thank you very much,

 > restart;
 > f := proc(x, y) options operator, arrow; sin(x)*cos(y) end proc:
 > Psurf:=plot3d(f, -Pi..Pi, -Pi..Pi, style=surface,               colorscheme=["zgradient", ["Orange","Blue"]]):
 > Pcont2D_1:=plots:-contourplot(f, -Pi..Pi, -Pi..Pi,                             coloring=["Orange","Blue"]):
 > Proj:=plottools:-transform((a,b)->[a,b,-1]):
 > plots:-display(   Psurf,   Proj(Pcont2D_1) );
 >
 >
 >
 >

## thank you very much, can i save th...

thank you very much, can i save this results as file data?

## @acer u2(x,y),u1(x,y),v1(x,y) and v...

@acer u2(x,y),u1(x,y),v1(x,y) and v2(x,y) are known functions and large size , w1(x,y) =diff(v1(x,y),x)-diff(u1(x,y),y) and w2(x,y) =diff(v2(x,y),x)-diff(u2(x,y),y) , i need calcute sum(abs(w2(x,y)-w1(x,y))) for x=0..10,y=0..10, What is the correct formula that can be used?

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