Christophe de Dinechin

icon indicating a website link http://c3d.github.io icon indicating an email [email protected]

icon company Red Hat icon location France icon location Working at Red Hat on virtualization and kata-containers. Interested in virtualization, 3D, compilers and language design.

Results 225 comments of Christophe de Dinechin
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Incorrect evaiuation of of `∂x(f(x+1))` and `∫x(f(x+1))`

Same problem with the `primitive` command `∫`

Incorrect evaiuation of of `∂x(f(x+1))` and `∫x(f(x+1))`

If we have `f` defined as `'x^2+sin(x)'`, then `'∂x(f(x))'` evaluates as `'2*x+COS x'` (which is correct) but then leaves `x` on the stack. If we evaluate `∂'x(f(2*x+1))`, then the stack...

Combining `FromHMS` and `ToHMS` gives unrounded result

Problem is caused by undesired conversion to fraction. In that specific case, the generated fraction is not generated with sufficient precision.

Combining `FromHMS` and `ToHMS` gives unrounded result

The correct solution is to make sure that the default value for `FractionIterations` is big enough to give us the correct result.

Unexpected behaviour of y^x function

This is a know issue with iOS, same as #1364. This should be fixed in the next iOS release. The problem is that the application displays the wrong keyboard image....