2011-02-18 21:11, Dmitry Shkirmanov skrev:
I tried it and received wrong answer.
Let's consider for example the code:
#
reset()
forget()
var(a,b,c,d,f)
assume(a-b0)
expr=(a^2-b^2)*f
expr2=sqrt(expr)
print(expr2.full_simplify())
#
It gives
sqrt(a - b)*sqrt(a + b)*sqrt(f)
But a-b0, so expression
sage: a=2; b=3; f=5
sage: assert(a-b0)
sage: sqrt(a-b)*sqrt(a+b)*sqrt(f)
5*I
sage: sqrt((a^2-b^2)*f)
5*I
sage:
Of course, you are right. But
#
sage: var(a,b,c,d,f)
(a, b, c, d, f)
sage: expr=sqrt((a-b)*(c+d))
sage: assume(a-b0)
sage: expr.full_simplify()
sqrt(-c - d)*sqrt(-a + b)
#
So
sage: expr2 = sqrt(a^2-b^2)
sage: expr2.full_simplify()
sqrt(a - b)*sqrt(a + b)
I am sorry, there is a mistake.
wrong answer gives
#
var(a,b,c,d,f)
assume(a-b0)
expr=sqrt((a^2-b^2)*f)
expr2=expr.full_simplify()
show(expr2)
#
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On Feb 18, 4:55 am, Dmitry Shkirmanov piminusme...@bk.ru wrote:
I asked Sage to solve the system of the equations:
#
var(pasquare,pbsquare,costhetasquare,Ea,Eb,ma,mb,mc)
assume(Eama)
solution=solve([pasquare*pbsquare*costhetasquare==((-ma^2-mb^2+mc^2)/2
+ Ea*Eb)^2, pasquare==Ea^2-ma^2,
After you get the output of the solve(), you can simplify() it to send
it back to Maxima, and that might work to get the assumptions
recognized.
I tried it and received wrong answer.
Let's consider for example the code:
#
reset()
forget()
var(a,b,c,d,f)
assume(a-b0)
expr=(a^2-b^2)*f
