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Topic	Replies	Views	Activity
What is a «lower triangular» matrix? Theory theory , mathematics , glossary	1	747	May 27, 2019
What is a Hermitian ( «self-adjoint») matrix? Theory theory , mathematics , glossary	0	623	May 27, 2019
What is the «conjugate transpose» («Hermitian transpose») of a matrix? Theory theory , mathematics , glossary	0	1456	May 27, 2019
What is the «complex conjugate»? Theory theory , mathematics , glossary	0	461	May 27, 2019
What is an «indefinite» matrix? Theory theory , mathematics , glossary	1	956	May 27, 2019
What is a «negative semi-definite» matrix? Theory theory , mathematics , glossary	1	787	May 27, 2019
What is a «positive semi-definite» matrix? Theory todo , theory , mathematics , glossary	1	859	May 27, 2019
What is a «negative definite» matrix? Theory theory , mathematics , glossary	1	841	May 27, 2019
What is a «positive definite» matrix? Theory theory , mathematics , glossary	1	713	May 27, 2019
What is the «transpose» of a matrix? Theory theory , mathematics , glossary	0	570	May 26, 2019
What is «stochastic modeling»? Theory theory , mathematics , glossary , todo	0	487	May 26, 2019
What is «covariance»? Theory glossary , theory , mathematics , probability-theory , statistics	0	594	May 26, 2019
What is «covariance matrix» («dispersion matrix»)? Theory glossary , theory , mathematics , probability-theory , statistics , covariance-matrix	1	6814	May 26, 2019
Rohan Kotwani - «Interesting properties and use cases of the covariance matrix» (2019-05-12) Theory theory , mathematics , probability-theory , statistics , covariance-matrix	0	446	May 26, 2019
Srishti Saha - «Let us understand the correlation matrix and covariance matrix» (2018-10-05) Theory theory , mathematics , probability-theory , statistics , covariance-matrix	0	533	May 26, 2019
Zakaria Jaadi - «A step by step explanation of Principal Component Analysis» (2019-02-28) Theory article , theory , statistics , principal-component-analysis , mathematics	0	1605	May 26, 2019
What is «standard deviation»? Theory statistics , glossary , theory , mathematics	0	630	May 26, 2019
What is «squared deviation from the mean» («SDM»)? Theory glossary , theory , probability-theory , mathematics , statistics	0	575	May 26, 2019
What is the «expected value» («expectation») in probability theory? Theory glossary , theory , probability-theory	0	596	May 26, 2019
What is «deviation» in statistics? Theory glossary , theory , statistics , mathematics	0	588	May 26, 2019
What is «mean deviation from the mean»? Theory glossary , theory , statistics , mathematics	0	653	May 26, 2019
What is «principal component analysis»? Theory theory , glossary , mathematics	0	610	May 26, 2019
What is «mean» («average») in statistics? Theory statistics , glossary , theory , mathematics	0	593	May 26, 2019
What is «variance» in statistics? Theory statistics , glossary , theory , mathematics	0	527	May 26, 2019
What is the «curse of dimensionality»? Theory glossary , theory , todo	0	471	May 26, 2019
What is «dimensionality reduction»? Theory statistics , glossary , theory	0	541	May 26, 2019
What is «feature extraction» («pre-processing») in machine learning? Theory theory , feature-extraction , glossary , feature	0	739	May 15, 2019
What is «correlation»? Theory theory , glossary , statistics	0	538	May 26, 2019
What are «bivariate data»? Theory theory , glossary , statistics	0	397	May 26, 2019
What is a «dependence» («association») in statistics? Theory theory , glossary , statistics	0	435	May 26, 2019