# Questions tagged [sparse-operator]

Problems in which an operator or function can be represented with asymptotically less data than the naive representation. For questions that are specifically related to sparse matrices use [sparse-matrix] tag instead.

4 questions
Filter by
Sorted by
Tagged with
112 views

### Invert a huge sparse operator;

please help me with this question, I want to invert a huge sparse (non-circulant) this below in a $Ax=y$ equation: $$(\lambda I+ \beta D+ \sigma C)x=y$$ where I is an Identity Matrix,D is a Diagonal ...
• 31
1 vote
183 views

### When should I write a matrix-vector function to handle the sparse matrix vector multiplication?

This semster, I have been studying the iterative methods for large sparse matrix system. But I have some questions. For large sparse matrix, we must use an economic storage to store them. The most ...
• 951
119 views

### Sparsity-Promoting Convex Optimization Over Simplex

Say we want to find a sparse approximate minimizer to the function $f(x) : \mathbb{R}^d \to \mathbb{R}$. Then in line with the work in the field of compressed sensing, we can instead minimize f(x) + ...
• 402