Questions tagged [factorization]
Questions on factoring various types of mathematical expressions, with the use of Factor, FactorInteger, FactorSquareFree and related commands.
186
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How to factorize $x+y$ in this kind of example?
Consider the following simple polynomial in two variables 5 + 2x + 2y. Suppose I want to simplify it to 5+2(x+y). I have no idea ...
- 481
0
votes
1
answer
39
views
How to make MMA distinguish between symbolic coefficients and variables when doing factorization? [closed]
I what to factor a polynomial with complicated symbolic coefficients
Factor[p0^2 + k^2 r^2 \[Tau]^2 - 2 k p0 r \[Tau]^2 \[Omega] + p0^2 \[Tau]^2 \[Omega]^2]
In ...
1
vote
2
answers
88
views
How to break a term in its individual factors?
I have some algebraic term that looks like this,
Conjugate[Subscript[u, 1, 1]] Conjugate[Subscript[u, 2, 1]]
\!\(\*SubsuperscriptBox[\(u\), \(1, 1\), \(2\)]\)
$$...
- 11
5
votes
2
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192
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How to make FactorInteger iterative?
I want to factorize big numbers like 10^100. FactorInteger with no Automatic option can take a lot of time and as I know there ...
0
votes
1
answer
119
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How to factor a quartic equation whose coefficient has unknown parameters?
i'm trying to see if a quartic equation I obtained can be factored into simpler forms, such as the product of two quadratics. The problem is that their coefficients are some complex expressions in ...
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votes
5
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538
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Prime factors with multiplicity
This is the function I came up with:
Flatten[ConstantArray @@@ FactorInteger[#]] &
Is there a way to write this cleaner or point-free?
Update: I only have ...
- 403
0
votes
2
answers
166
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What method is there to retrieve which quantity to replace and complete factorization?
What method is there to retrieve which quantity to replace and complete factorization?
The following polynomial equation cannot be directly factorized, and the result obtained by directly factoring is ...
- 2,879
3
votes
1
answer
111
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Factor gives non-factorized result
The Factor built-in function is usually idempotent, namely applying it twice gives the same result. However, in the following example it is not. Is that expected? ...
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143
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Factorization of 5th polynomial with Wolfram-Mathematica
I have a very complicated 5th-degree polynomial form. Using the factor function in Wolfram is impossible to make it because of the high degree. I just want to know that is it possible to factor as I ...
1
vote
1
answer
48
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Factoring without need to guess the extension
To provide a simple example (but I need more complicated ones): I want to factor x^2-6x*y+y^2. After solving x^2-6x*y+y^2==0 I ...
- 1,874
0
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1
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74
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Stop Apart from automatically simplifying complex rational expressions [duplicate]
I want to conduct partial fraction decomposition to rational function on $\mathbb C$ and tried this
...
- 153
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59
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How to properly factorize expression with respect to specific combinations of terms?
This is something that I have never been able to properly do in Mathematica so I wish to learn how to do it once and for all.
I have the following expression in Mathematica:
...
- 953
2
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1
answer
67
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How does Mathematica factor expression with derivatives (i.e. not polynomial)?
I was surprised Mathematica did this automatically. I have an ode and wanted to factor it. I did not think Factor will work and I need to write special code to do ...
- 137k
3
votes
2
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205
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Function to write an algebraic expression in terms of another
So I'm working on a physics problem. I have two functions:
$\rho = \frac{F}{(\beta F^\alpha+1)^\frac{1}{\alpha}}$, $p = - \frac{F}{(\beta F^\alpha+1)^\frac{1}{\alpha}} + \frac{4}{3}\frac{F}{(\beta F^\...
0
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54
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Easiest way to print without breakline
So I have factorized a transfer function and stored the terms in a variable. I want to print the product of terms without Mathematica joining them and without a break line. I have managed the first, ...
15
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4
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Automating interesting ways to write 2023
Inspired by Interesting ways to write 2023, I was wondering if there are ways to automate the search for results using MMA.
I tried
...
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70
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Putting everything with the same power together
I'm doing some computations wich involves a lot of big polynomials, for example:
...
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57
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How to express the given function as a factor $e^{7 i x}$ times a real function?
I have the function $f(x,b,t,m)$ for $\{x>0,t,b\}$ all reals and $m=\{1,2,3,4,5,6\}$. For each particular $m\in\{1,2,3,4,5,6\}$, I see that $f(x,b,t,m)$ has a multiplicative factor $e^{7 i x}$ ...
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42
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Getting List of Factors in a monomial. Is FactorList reliable?
Say I'm given a monomial which is a product of factors,
$X_{i_1} \times \cdots \times X_{i_n}$.
I find that
...
- 175
4
votes
1
answer
87
views
Simplify polynomials with simple subfactors
I am trying to simplify expressions such as
poly = 1 + (-2 + 4 a^2) x^2 + x^4
to the form
polySimple = (1-x^2)^2 + 4 a^2 x^2
...
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63
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Meaning of Extension option in Factor
I would like to ask about the Extension option in Factor function.
In the reference, there is the following example. Factor a ...
- 501
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2
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327
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Factorize in a particular way
I was trying to factorise this polynomial expression:
TestPolynomial=-p1^2 x1 x2 - p3^2 x1 x3 - p1^2 x2 x3 + 2 p1 p3 x2 x3 - p3^2 x2 x3
into this form,
...
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votes
1
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76
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Factorize expression by specific term [closed]
I am new to Mathematica but I would like to know how to force Mathematica to factorize an expression by a specific term.
Exemple, imagine I have a term like this:
And I have an expression like this:
...
5
votes
3
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186
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Factoring a quadratic form associated with a $4 \times 4$ matrix into a sum of four squares
The matrix W = $\left(
\begin{array}{cccc}
5 & 7 & 6 & 5 \\
7 & 10 & 8 & 7 \\
6 & 8 & 10 & 9 \\
5 & 7 & 9 & 10 \\
\end{array}
\right)$
has a ...
- 747
2
votes
0
answers
114
views
A remarkable elimination involving the basic reproduction number R0
I have a polynomial pol of third order, whose coefficients depend on 5 parameters, and whose free coefficient is proportional to R0-1, where R0 is a certain rational function of the parameters (the ...
- 1,592
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0
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76
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“Largest” symbolic common factor of an integer sequence (not simply GCD)
Suppose, I have a finite fragment of a quickly increasing sequence of integers $\{a_n\}$ that is too complex, unusual, or irregular for FindSequenceFunction to find ...
- 7,163
1
vote
2
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117
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Finding coefficients where part of the coefficient may appear in the terms
A minimal example is given below. My goal is that given a algebraic expression such as:
expr = a^2 + a b + a^3 b + 2 a^2 b^2 + a b^3
I'm trying to find a command, ...
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3
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1
answer
147
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Is there a way to collect the multiple power into a single power?
I am looking away to factor perfect powers like follows:
FactorPerfectPower[16x^2] should produce Inactive[Power][4x,2].
...
- 9,113
0
votes
1
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51
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Simple Question: Cut Number in Transfer function
Given transfer function:
$W=\frac{10 (s+100)}{2 s^4+219 s^3+1909 s^2+900 s+1000}$
W=(1000 + 10 s)/(1 (1000 + 900 s + 1909 s^2 + 219 s^3 + 2 s^4))
Which command to ...
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145
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Approximate integer factorization
Suppose we would like to compute an approximate prime factorization of a large integer x in the sense that the difference between ...
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160
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How to convert $a(x-p)^2+q$ to $a(x-\alpha+i\beta)(x-\alpha-i\beta)$ for any real $a$, $p$ and $q$ [duplicate]
I want to factorize any quadratic expressions into two complex-valued linear expressions.
My effort below
...
- 1,879
3
votes
1
answer
70
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Expression should vanish under assumptions. How can I use Mathematica to simplify this type of of expression (and similar)?
This is maybe the worst type of question because it is super specific, but I am hoping that some Mathematica function or rule exists (built-in or custom) that can be helpful for simplifying a somewhat ...
- 33
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Factorize the multivariate polynomial [closed]
I came across the following problem:
Factorize the multivariate polynomial given by:
$$w*(A^2-2l*A+1)*f+v*(B^2-2m*B+1)g+u*(C^2-2n*C+1)*h+(w*(x+2A*l+A*s-l*s-A^2-1)+v*(y+2B*m+B*t-m*t-B^2-1)+u*(z+2C*n+C*...
- 121
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Extract subscript of variable in product
My input is a product of the variable x with index:
x[1]^2 x[5] x[7]
How do I extract the indices of the above product to get ...
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143
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How to prime factorise rational numbers [closed]
I'm aware of the built-in FactorInteger command for finding the prime factorisation of integers. Is there a convenient way of determining the same thing for a rational number, where the prime ...
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1
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131
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Factorizing large numbers [closed]
I am trying to factorize large prime numbers with the code bellow. The code works properly for values like 1927 and 69527 (results), but gives no result for larger values like 655051. The code goes as ...
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2
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How can I test if the sum of two divisors of a number add up to a perfect square? [closed]
Let's say I have a number $n$ and I want to find the divisors of $n$, I can do that using Divisors[n]. That will generate a list ...
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3
votes
1
answer
102
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Return the factors of a partially-factored polynomial, without factoring
Suppose I have an integer polynomial f that is in a factored form, say f = (1 + x) * (2 + x + x^3) * (2 + x^5). I want a ...
5
votes
1
answer
147
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Check if polynomial is in factored form, without factoring
I have a large list list of integer polynomials, all of which are the output of Factor. So my list looks something like this: <...
2
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0
answers
143
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About Fermat's Integer Factoring algorithm
An implementation of Fermat's algorithm that is a slight improvement on code in this book is here.
...
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296
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Speeding up FactorInteger for product of two primes
I have a large integer $N$ of size about 10^150. I know that $N$ is a product of two primes $p$ and $q$. I also know that both $p$ and $q$ are of roughly equal size, so one of them is not, for example,...
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How to factorize $f(x,y)$ into $f_1(x)f_2(y)$? [duplicate]
Suppose we have a real function $f:\mathbb R^2 \rightarrow \mathbb R$ and we would like to know if this function factorizes into $f(x,y)=f_1(x)f_2(y)$ for some real functions $f_1,f_2$. Is there an ...
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How to factor a polynomial expression with variable coefficients (and imaginary values)
How can I factor terms with variable coefficients?
For example for the expression: $x^2 + a$
I know that I can factor this to: $(x+i\sqrt{a})(x -i\sqrt{a})$
How do I do this in mathematica?
I would'...
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3
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236
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Collect with a product of patterns
In the examples below, I notate Subscript[S, n] as Sn for brevity.
I'm trying to take expressions like
...
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1
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5
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How to find the 2 smallest integers that is divisible by 40131 and 41405 [closed]
I'm trying to find the two smallest integers that is divisible by 40131 and 41405, i.e 40131|a, 41405|a, 40131|b and 41405|b. There is a hint within the question that says you can use FactorInteger[] ...
4
votes
2
answers
340
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How to write a positive function as sum of positive terms only
A multivariate polynomial function can be written in a certain form (x^m (1-x)^n y^k + ... ) if the function is Positive in the whole domain and contains a finite ...
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41
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Can you save each factor of a polynomial?
I have a question I'm factoring a polynomial in Mathematica. After having the polynomial factored, I want to manipulate each factor. So my question is if there is anyway I can save each factor in a ...
4
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204
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Prime factorization over the Eisenstein integers $\mathbb{Z}[\zeta]$
I am trying to write a function f[a_,b_] which takes in two integers $a,b$ and returns the unique factorization of $a+be^{2\pi i/3}$ into the primes belonging to $\...
1
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1
answer
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A question about FactorList[] [closed]
FactorList[24 + 80 x + 102 x^2 + 62 x^3 + 18 x^4 + 2 x^5]
{{2, 1}, {1 + x, 2}, {2 + x, 2}, {3 + x, 1}}
what does the "1" of "{2,1}" mean?
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Help me factor this equation
I have the following equation:
$$\frac{2\left(a A_3 r + \frac{1}{2} r^2 a'^2 \right)}{a^2 r^2}=\frac{8 G \pi \rho}{3}-\frac{c^2 k}{a^2}$$
...
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