Overriding "solve may be ignoring assumptions" in Maple

Question

I am trying to solve a system of equations in Maple, but when I have it computing, I get a warning that says "solve may be ignoring assumptions on the input variables."

The Set-Up

My equations are polynomials in $x$ defined as letters $t$ through $z$ and coefficients as $a$ through $h$. I want to get expressions for the coefficients, which should be possible with 6 equations and 6 unknowns. These coefficients are defined as greater than zero since they correspond with forward moving rates. The set up is as follows:

t:= equation1, assume a>0,b>0,c>0,d>0, etc

u:= equation2, assume a>0,b>0...

...

z:= equation3,assume a>0,b>0...

solve({t,u,v,w,x,y,z},{a,b,c,d,e,f,g,h})

Alternative Set-Up

I have also tried putting the same list of assumptions within the solve command, but I get the same error.

solve({equations},{variables},{assume a>0, etc})

The first few times I tried either of these, Maple would give me an answer that made $a=0$ and $b=0$, but now it won't even give me these trivial solutions, which is confusing. Any help would be greatly appreciated. Thanks in advance!

Answer 1

You want to use solve(..., useassumptions = true) to ask solve to make sure it uses those assumptions.

Note that it is usually a better idea to put in the inequations directly into the system rather that as assumptions for the purposes of calling solve.

The help page solve/details (i.e. do ?solve,details in Maple) documents all the options that solve takes.