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Questions tagged [symmetric]

is used in its general meaning, so you are encouraged to use one or more tags in addition to this tag, to describe your case better.

An example of Symmetric would be a Symmetric Key, which is used in both the sides of an algorithm in cryptography.

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Finding the largest determinant in a symmetric matrix with limited integer values on R

I'm using R to try and find the largest possible determinant that a symmetric 3x3 matrix, all of whose entries lie in the set of integers {1,2,3,4,5,6} can have? Any ideas how I'd go about this?
user3229522
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symmetric FFT in matlab

I'm going to implement OFDM system in matlab. I need to take IFFT symmetric from data and then again FFT from results. the IFFT goes right, but the FFT doesn't, fisrt half of result numbers are like data bef0r IFFT, but second half is wrong. I just…
Beh
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Calculating (A - B(D^-1)B^T )^-1 with CUDA

What might be the most efficient way of calculating the following expression using CUDA C ? (A - B(D^-1)B^T )^-1 where D is a very large symmetric matrix and A is a small symmetric matrix, which makes B and B^T medium sized rectangular…
hko
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How to configure cublas{t}symm() function arguments

This function performs the symmetric matrix-matrix multiplication using CUDA. Although, I succeeded in using the nonsymmetric version "cublas{t}gemm()" I couldn't use the "cublas{t}symm()" function properly. I know that CUBLAS library uses…
hko
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cheking on symmetric number

How check number on symmetrics? public static int Symmetric(int a) { if(new StringBuilder(Integer.toString(a)) == new StringBuilder(Integer.toString(a)).reverse()) return a; else return 0; } I try do it smth like…
Roman Chyzh
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Symmetric DS taking too long on DataExtractorService

I'm using SDS to migrate data from a SQL server to a Mysql database. My tests of moving the data of a database that was not in use worked correctly though they took like 48 hours to migrate all the existing data. I configured dead triggers to move…
jameslimousin
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How to not repeat permutations of i and j in “i not equal to j” loop in Python?

An exhaustive “i not equal to j” loop typically starts out as for i in range(t): for j in range(t): if i is not j: To avoid repeating symmetric results (i.e. any i with j just gives the same answer as j with i), how can we additionally…
develarist
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How to find the biggest symmetric word using Python in quick way?

I have a text like this: a ab aba bob dod doood zoroz rar goog bnb and I want to find the biggest symmetric word in this text. How can I do it? I'm looking for the fastest way possible.
Keivan
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(python matrix check symmetry) why does it return 1 no matter the matrix input?

This python code should check the matrix symmetry and should return 1 if it is symmetric, -1 if it is skew symmetric and 0 otherwise. My code always returns 1. How come? N=3 def isSymmetric(mat,N): for i in range(N): for j in range(N): …
mcgrim8 mcgrim8
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Don't understand this IndexError using numpy

I am given a quadratic matrix and have to do as follows: For each entry (i,j) in the matrix If i = j: set y[i,j] = x[i,j]. Else: set y[i,j] = x[i,j] + x[j,i] I have made the following script: def symmetrize(x): ## The…
Charles Hay
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5 answers

first index to matrix is ignored

I am trying to see if a 4x4 matrix is symmetric, and below is what i have so far. Upon compiling I receive the message: pExam3p2.c:12:13: warning: expression result unused [-Wunused-value] if (Num[r,c]==Num[c,r]){ …
user9741196
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How secure is to use Rijndael symmetric encryption algorithm

Please let us know how secure is Rijndael symmetric encryption algorithm. The key is stored in web config file.
user3190525
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check if two bytes are symmetric

I heard this is a question asked in an interview, given two bytes, return true if they are symmetric public boolean isSym(Byte firstByte, Byte secondByte); 01101000 and 00010110 are symmetric, but 01100000 and 11000000 are not. need to write the…
Dan The Man
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How to find symmetrical words in string?

I've been trying to make this work for a while now. I need to make a program for school project that takes a string and counts symmetrical words inside it. There are supposed to be sentences inside, but anything helps. I can't seem to get it to…
Piskot
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Difference between symmetric and asymmetric matrix

I'm practising with graphs and adjacency matrices. But I couldn't find a good example that differentiates symmetric and asymmetric matrix. Can anyone tell me how to distinguish the difference between symmetric or asymmetric matrix.
JVTura
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