A new paper with new…

A new paper with new friends from the University of North Florida is online now in Linear Algebra and Its Applications.


The following picture for positive…

The following picture for positive numbers is obvious. And it is surprising that hundreds of papers were published in good journals to with purpose to understand the same picture for positive matrices.1111

Such messages make me happy…

Such messages make me happy and renews my energy and love of my job.

Hey Hoa,
I just wanted to tell you that I appreciate all the effort you put in to helping me this semester. I appreciate that you see my potential and that you strive to make me better. Thank you for everything and have a good break.

Hey I just wanted to say thank you for a great semester. I really appreciated you helping me get through it. I hope you have a merry Christmas and enjoy the break. Thanks.

I felt very prepared for the final today thanks to your class. Our test problems were more difficult than anything I saw and they made parts of the final seem very easy. I have enjoyed learning and laughing in your class this semester and I hope you have a very merry Christmas.

Thanks a lot. Merry Christmas!

Paper with Prof. Tin-Yau Tam…

The paper with Prof. Tin-Yau Tam and A. Sima is online at:
In this project, A. Sima partially worked under my supervision.

A new paper entitled

A new paper entitled “An extension of the Polya–Szego operator inequality” with new friends was accepted for publication in Expositiones Mathematicae.

Link to the paper: http://www.sciencedirect.com/science/article/pii/S0723086916300639


Almost ten years ago I…

Almost ten years ago I have studied the non-commutative integration theory on von Neumann algebras. It seems that not every matrix inequality can be automatically transferred to von Neumann algebras case. Maybe, it has some meaning to get back!

I will start from my recent paper in LAA http://www.sciencedirect.com/science/article/pii/S0024379516303962!!

The next conference will be…

In this photo I stood on the left side 🙂


The next conference will be held in my hometown – Danang City. Please find some information about that at the webpage:

You are welcome to join us!!!!