# Questions tagged [parallel]

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### On parallel complexity of modular inverse

Modular inverse is not known to be in $NC$ either. How about the cases where the modulus is just $2^k +i$ where $i\in\{-1,0,1\}$? Are these cases in $NC$?
61 views

### Unclear explanation of basic parallel DAG computation

Consider computation represented as a DAG, without if-then-else conditions, where nodes represent tasks and edges represent data dependencies. For example, A->B->C means that there are 3 tasks ...
78 views

### How to know if a problem is distributable?

I am new to the world of Parallel computing and that is why don't know exactly where I should look at or search to get the answer. Is there any theorem or just general theory determining which code ...
124 views

### parallel algorithms for the determinant of the Hessenberg matrix

I am interested in highly parallel algorithms for computing the determinant of matrices of a special form (over finite fields). It is known that computing determinant of general matrices over finite ...
52 views

### Best complexity bound for parallel matrix-vector product?

I'm looking for the best known complexity (and a bound for the number of processors invoved) to do the calculation of a $(n,n)$ matrix-vector product. Thank you
119 views

### Is Ralf Hinze's Discriminator sort parallelizable?

According to this slide - the following sorting algorithms Merge Sort Insertion Sort Bubble Sort Quicksort Bogosort all rely on cmp - which has a fixed upper ...
415 views

### Finding optimal parallelization from general weighted undirected graph

I am solving a problem of "blending" sets of overlapping images. These sets can be represented by undirected weighted graph such as this one: Each node represents an image. Overlapping images are ...