Hello Everyone.
From :
But :
To : So now the question is : " How to simplify A ? "
Thanks in advance for your time and help.
Best Regards.
Loi
1 ACCEPTED SOLUTION
Accepted Solutions
The two expressions definitely are equivalent.
With a little help even Mathcad can show this:
The numerical evaluations are just done to check if I made any typing errors 😉
But its interesting that MC11 returns 0 when we compare the expressions while MC15 returns 1.
It may have to do with the principal value of the third root ? Not sure, though.
Are the results the same in MC11 ?
You have to face the truth - the symbolics in MC15 seems not to be capable enough to do the simplification you want to see.
Neither is the symbolics in Prime 10 - see here:
Only way to achieve the result you are looking for in MC15 seems to be as in attached, but I am sure you won't like it 🙂
Attached Sheet is in MC11 format, maybe @LucMeekes would like to give it a try with MC11/Maple.
I guess my MC15's symbolic engine is less powerful than your .mcd file. But I guess I should like your own mcd. file :
Best Regards.
Mathcad11/Maple:
Which means the two expressions are NOT equal.
The reason you get:
is because there's a hidden assignment (Note the redefinition indicator on A below):
behind the
The first assignment to A (very first at the top) also has a redefinition indicator, due to A redefining the unit Ampere.
Success!
Luc
The redefinition in the hidden area was meant as a joke of mine an I also had written that MC seems to be unable to do the desired simplification and that I am sure that the only 'solution' I could think of won't make @lvl107 happy 🙂
His reply showed that he discovered the hidden area ...
Nonetheless MC15 actually claims the two expressions to be equal, even though its not able to simplify accordingly.
Find attached the original unchanged sheet of @lvl107 in MC11 format.
P.S.: Calculating the difference of the expressions seem to throw just numerical round-off errors.
Interesting is that when I use "float,200" I again get a tiny difference of about -1.6*10^201
The two expressions definitely are equivalent.
With a little help even Mathcad can show this:
The numerical evaluations are just done to check if I made any typing errors 😉
But its interesting that MC11 returns 0 when we compare the expressions while MC15 returns 1.
It may have to do with the principal value of the third root ? Not sure, though.
Are the results the same in MC11 ?
They're different, because Mathcad 11 doesn't support 'rectangular':
Regarding the simplification. I guess the challenge is to find the right symbolic keyword:
Note that with 'simplify' and 'expand' I just get a big expression.
However, Mathcad11/Maple will not simplify A to the other expression. Guess that's down to the basic problem: It's hard, to impossible, to control the output of the symbolic processor.
Success!
Luc
@AlfredFlaßhaar wrote:
In the graph in MC14, the green point for Y is not shown.
The file was "Save As" as "Snub Cube _ MC13" :
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Regards.
