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### Set Underflow precision in Mathematica 12 same as version 11.x [duplicate]

It seems like Mathematica version 12 sets arbitrary underflow precision depending on the function, but I would like the underflow precision to be same as what was for previous version of Mathematica ...
2k views

### How to flush machine underflows to zero and prevent conversion to arbitrary precision?

I'm working on some pretty intense computation in Mathematica; when my code started running slowly, I tracked the source of the problem to Exp[]. I need to ...
1k views

### New General::munfl error and loss of precision

The latest version 11.3.0.0 of Mathematica returns Indeterminate when evaluating Log[Exp[-800.]]. I believe this was not ...
1k views

### Function to Expand exponentials

Is there a function similar to PowerExpand which expand exponentials? This would, for example, take Exp[5(a + b)] and ...
162 views

### Plotting with Precision

Suppose we plot Plot[Exp[x] Exp[-x], {x, 0, 1000}] This equals $1$, as expected, until around $x = 750$ where the curve drops sharply to $0$. Clearly this is due ...
191 views

### How to check for underflow, and find a constant to correct it?

In a programme I'm running, at a certain point there's a multipplication of variables that gives underflow... For example $c=c_1\times c_2$. Is there anyway to check if that multiplication gives ...
292 views

### Format Exp[] in output

The output of foo=Exp[x] is formatted automatically as $e^x$. For long expressions it's not as easy to read as Exp[...]. How to format the output so that \$e^{...
192 views

### Getting error General::munfl from NonlinearModelFit [duplicate]

I am trying to fit data to a sum of Gaussians. This data is found in a file called lpeff.txt. So I write the following code: ...
76 views

### Precision lost on function estimation

I'm trying to plot a function such as: ...