The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A350932 Minimal determinant of an n X n Toeplitz matrix using the first 2*n - 1 prime numbers, with a(0) = 1. 5

%I #27 Apr 04 2024 10:21:36

%S 1,2,-11,-286,-57935,-5696488,-1764195984,-521528189252

%N Minimal determinant of an n X n Toeplitz matrix using the first 2*n - 1 prime numbers, with a(0) = 1.

%H Lucas A. Brown, <a href="https://github.com/lucasaugustus/oeis/blob/main/A350932%2B3.py">A350932+3.py</a>

%H Mathematics Stack Exchange, <a href="https://math.stackexchange.com/questions/1762537/why-is-the-determinant-of-the-0x0-matrix-equal-1">Why is the determinant of the 0 x 0 matrix equal 1?</a>

%H Wikipedia, <a href="http://en.wikipedia.org/wiki/Toeplitz_matrix">Toeplitz Matrix</a>

%e a(2) = -11:

%e 2 3

%e 5 2

%e a(3) = -286:

%e 5 7 2

%e 11 5 7

%e 3 11 5

%p f:= proc(n) local i;

%p min(map(t -> LinearAlgebra:-Determinant(LinearAlgebra:-ToeplitzMatrix(t)), combinat:-permute([seq(ithprime(i),i=1..2*n-1)]))) end proc:

%p f(0):= 1:

%p map(f, [$0..5]); # _Robert Israel_, Apr 01 2024

%o (Python)

%o from itertools import permutations

%o from sympy import Matrix, prime

%o def A350932(n): return min(Matrix([p[n-1-i:2*n-1-i] for i in range(n)]).det() for p in permutations(prime(i) for i in range(1,2*n))) # _Chai Wah Wu_, Jan 27 2022

%Y Cf. A318173, A350930, A350933 (maximal).

%K sign,hard,more

%O 0,2

%A _Stefano Spezia_, Jan 25 2022

%E a(5) from _Alois P. Heinz_, Jan 25 2022

%E a(6)-a(7) from _Lucas A. Brown_, Aug 27 2022

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 22 06:48 EDT 2024. Contains 372743 sequences. (Running on oeis4.)