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Error in evaluating an inverse Matrix

Hi,

When evaluating the inverse Matrix of A, i got two different results in MP4 using the symbolical evaluation and the evaluation with "=".

Creating the same inverse Matrix in MC15 does give the same correct results by evaluating the same way like above.

Has somebody the same experience when calculating Matrices in Prime?

See attachement please.

Best answer by Werner_E

I can't open your file and just gave it a try with Prime 3.0.

Here all ist OK as it should be.

Only if I set the math format to "Decimal" with 0 decimals displayed, I get the result seen in Valery's pictures.

So unless you accidentally used that misleading setting in your sheet, its definitely a severe bug introduced after P30.

What do you get if you evaluate A*A^-1= ? If you still get the identity, its just a display probem, otherwise its an even more fatal bug.

24-Ruby IV

I think it is a bug in Mathcad Prime 4!

24-Ruby IV

All OK in Mathcad 15

Answer

25-Diamond I

I can't open your file and just gave it a try with Prime 3.0.

Here all ist OK as it should be.

Only if I set the math format to "Decimal" with 0 decimals displayed, I get the result seen in Valery's pictures.

So unless you accidentally used that misleading setting in your sheet, its definitely a severe bug introduced after P30.

What do you get if you evaluate A*A^-1= ? If you still get the identity, its just a display probem, otherwise its an even more fatal bug.

24-Ruby IV

@WernerExinger wrote:

I can't open your file and just gave it a try with Prime 3.0.

But I can - it is for my Mathcad Mad House!

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