# Questions tagged [number-representation]

Questions about interpretation of numeric input or how Mathematica stores and manipulates numbers internally.

16 questions with no upvoted or accepted answers
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### NMinimize seems to call function with the same values multiple times

I have to minimize a function where the evaluation of one parameter set takes very long (around 5sec) and discovered alongside, that NMinimize seems to call this ...
123 views

### How does Mathematica evaluate N[π, 30] == π?

I want to know how N[π, 30] == π works. The result is True. I wonder whether the exact number ...
135 views

### RealDigits and functional style

So while thinking about Replacing numbers of which you only know certain digits I have faced, again, a problem that I find hard to extract from RealDigits' output ...
114 views

### Check the data of representations of Lie groups

Is there a way in Mathematica to check the data of representation of Lie groups? For example, the number of generators. the rank (or the dimension) of the representation matrices. and a list of all ...
146 views

### Rationalize error

The docs state that "Rationalize[x,dx] yields the rational number with smallest denominator that lies within dx of x." However, testing this out it appears to be false. ...
189 views

### The binary of negative integer number

I have a question about the binary of negative integer number in Mathematica. In most implementations, negative signed integers are stored in what is called two's complement. The other major way of ...
800 views

### How to work with large numbers

How do I browse very large numbers in mathematica, say $10^{{10}^{{10}^{1.414\ldots}}}$? By browse I mean finding the $k$th decimal place before or after the decimal point. Everything I have tried ...
36 views

### How to control the visible area (up and down the line) in NumberLinePlot?

How can you control the up and down line visible part of the graph? The target if view arrosw and text below the line (purple arrow) and if it´s posible make great the upper area ...
38 views

68 views

### Solving a system of linear equations in Mathematica regarding the errors of different methods

I have a system of equations, i.e. 0.62243x + 0.51824y = 0.70524 0.71497x + 0.59496y = 0.80996 I have 3 ways to solve this system (there are more but I am ...
52 views

### Decimal representation in Mathematica 10

I am using a slider to assign the value for a dynamic variable x, and want to display the value of y=10^Dynamic@x in decimal ...
Considering a fraction: val = "F \!$$\*FractionBox[\(1$$, $$1$$]\)"; I extract the part of interest: ...