My Math Forum Positive definiteness

 Linear Algebra Linear Algebra Math Forum

 February 13th, 2017, 05:30 AM #1 Newbie   Joined: Feb 2017 From: srilanka Posts: 2 Thanks: 0 Positive definiteness If A is a symmetric positive definite matrix, B is diagonal matrix and B>0 then Can we say A-B is positive definite matrix? If so, please let me know the source. Thanks. Last edited by mkayan; February 13th, 2017 at 05:57 AM.
 February 13th, 2017, 03:42 PM #2 Senior Member   Joined: Sep 2016 From: USA Posts: 114 Thanks: 44 Math Focus: Dynamical systems, analytic function theory, numerics definitely not. Take for an example $A = I$ is the identity matrix and $B = 2I$ is twice the identity.
 February 13th, 2017, 04:43 PM #3 Newbie   Joined: Feb 2017 From: srilanka Posts: 2 Thanks: 0 many thanks.

 Tags definiteness, positive

 Thread Tools Display Modes Linear Mode

 Similar Threads Thread Thread Starter Forum Replies Last Post mared Algebra 3 April 7th, 2014 04:07 PM Akcope Calculus 0 March 20th, 2014 08:43 AM josellie1234 Number Theory 10 August 20th, 2013 09:28 AM nabran Linear Algebra 1 October 14th, 2011 05:28 AM thetouristbr Linear Algebra 11 May 31st, 2010 03:58 AM

 Contact - Home - Forums - Top