This post has been de-listed
It is no longer included in search results and normal feeds (front page, hot posts, subreddit posts, etc). It remains visible only via the author's post history.
1
Matrix Notation for k Combinations of n Elements
Post Flair (click to view more posts with a particular flair)
Post Body
Is there any way to list all the k-subset of a vector and write it in terms of matrix notation? Example:
Given the image above, vector a contains n = 4 elements. I want to return a vector containing n choose k elements. At k = 2, the components of the vector are the elements of the strict upper triangular matrix of the inner product of a and itself.
Author
Account Strength
90%
Account Age
5 years
Verified Email
Yes
Verified Flair
No
Total Karma
309
Link Karma
26
Comment Karma
283
Profile updated: 2 days ago
Subreddit
Post Details
We try to extract some basic information from the post title. This is not
always successful or accurate, please use your best judgement and compare
these values to the post title and body for confirmation.
- Posted
- 4 months ago
- Reddit URL
- View post on reddit.com
- External URL
- reddit.com/r/askmath/com...