202 views

### Mathematica Input to get the exact form [duplicate]

Question: Is there a command in mathematica that can take a decimal input, and output it into its exact form? The question arose when I tried to use this command: ...
96 views

### Number recognition in Mathematica [duplicate]

Suppose that I have a number $n$ with many decimal digits of precision. What is the code to use to get Mathematica to recognize possible closed-form expressions for that number?
74 views

### Analogue of Maple's identify command in Mathematica [duplicate]

In Maple there is a useful command identify that tries to find a closed form expression based on its numeric approximation. As far as I know there is no built-in ...
73 views

### Can FindFormula or FindSequenceFunction be used to identify a formula for a number? [duplicate]

This is closely related to: https://math.stackexchange.com/q/2361727/10063 and is a new version of Can Mathematica propose an exact value based on an approximate one?. In Wolfram|Alpha I can input ...
70 views

### What is MM routine function that does the opposite of what N does? [duplicate]

I would like to convert these numbers to their closest fractional equivalent to see if there is any pattern linking them e.g they are all mutiple of some basic fractional number. The numbers are: <...
2k views

### Is it possible to invoke the OEIS from Mathematica?

I had always wondered if there might be a way to write a function, which I'll call OEISData[], that more or less works as a curated data function for The On-Line ...
927 views

### Volume bounded by two spheres

I'd like to find the volume of the region of intersection of the spheres defined by $$x^2+y^2+z^2=4$$ and: $$x^2+y^2+z^2+4x-2y+4z+5=0$$ I tried: ...
845 views

### How to tick the intersection with x axis automatically?

I am plotting a simple sinusoidal function as below. Is there a way to tick the intersection of the function and x axis automatically on the plot? ...
696 views

### Is it possible to find a limit of a sequence given by its recurrence relation?

I need to calculate a limit of a sequence given by its recurrence relation. I tried the following: ...
536 views

### Recognize physical constants?

Is there some way to ask Mathematica to recognize physical constants, such as 32 or 9.81 (gravitational acceleration, in different units, at Earth's surface)? I have in mind something like the "...
249 views

### How to using the method of undetermined coefficients in this equation?

I want to find the rational numbers $a$, $b$, $c$ satisfying the condition $$\displaystyle \int _ { 5 } ^ { 21 } \frac { \mathrm { d } x } { x \cdot \sqrt { x + 4 } } = a \ln 3 + b \ln 5 + c \ln 7.$$ ...
373 views

### Output an Expression in terms of GoldenRatio

Sorry if this is a dumb question (I'm new). I swear I searched and read forums first! I'm trying to rewrite expressions in terms of the Golden Ratio. For example, I know 9+4Sqrt[5] is Phi^6, but can ...
For example, suppose I want to factor $x^4+1$ over reals. Calling Factor without options doesn't help because by default it factors over integers: ...