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Amir Massoud Rahimi is a Blind Mathematician and an Associate Researcher at the Institute for Research in Fundamental Sciences.

Early life and education
Rahimi earned his bachelor's degree in mathematics at University of North Texas, his Master's degree at The University of Texas at Arlington, and a PhD in Mathematics as a graduate student of The University of Texas at Arlington.

Career and research
He joined to the School of Mathematics at the Institute for Research in Fundamental Sciences in Iran in 2000. Much of his research is related to Commutative ring and Semiring and Algebraic combinatorics (Graphs associated to Algebraic structures). Rahimi initiated the notion of strongly stable range in commutative rings and stable range in commutative semirings and unitary modules. He also introduced the notion of Smarandache Vertices for the graphs and applied it to the zero-divisor graphs of commutative rings. Besides, He has done some research on Number theory, Bioinformatics (protein structure), and Hyper Dice Backgammon of finite size. He also was the supervisor for Master thesis in Mathematics education related to Comparing Nemeth Braille Math Code with Persian Braille Math Code at Azad University of Zahedan in 2012 and co-advisor for the thesis in Graph Theory and Game Theory at Shahid Beheshti University in 2003 and 2005.

In 2016, Rahimi joined to the Department of Mathematics of University of South Africa as a visiting researcher for two years.

He has founded a new branch in number theory using center of mass, namely, Arithmetical inequalities, which is an elementary approach to a class of Diophantine equations, Beal conjecture, and Fermat's Last Theorem using center of mass. This work takes an interesting approach to conceptualize some power sum inequalities and uses them to develop limits on possible solutions to some Diophantine equations.

Rahimi has generalized the standard (classic) backgammon to Hyper Dice Backgammon of finite size by extending the board and the dimension of the dice to an abstract n-cube, which will be a solid platform for mathematicians, computer scientists, to (specially) study the complexity classification, artificial intelligence (AI) professionals, and game theorists to study other related things in this field.

Some Selected Publications
A class of commutative semirings with stable range 2

Hyper Dice Backgammon of Finite Size

An Elementary Approach to Diophantine Equation ax^m + by^n = z^r Using center of Mass.

The Annihilation Graphs of Commutator Lattices with Respect to an Ideal

The Annihilation Graphs of Commutator Posets and Lattices with Respect to an Element Some Graphs Associated to Commutative Semirings

Dominating Sets of the Comaximal and Ideal-based Zero divisor Graphs of Commutative Rings

Amir M. Rahimi, Anannihilating Ideal Graph of a Commutative Ring with Respect to an Ideal,

Smarandache Vertices of the Graphs Associated to the Commutative Rings

Ston: A novel method for protein three-dimensional structure comparison

The k-zero-divisor Hypergraph of a Commutative Ring

Some improved results on B-rings

Researchgate

Some Selected Talks
Relative algebraic structures, American Mathematical Society (AMS), Annual Meeting, San Antonio (USA), January 1999. Some improved results on B-rings, American Mathematical Society (AMS), Annual Meeting, San Diego (USA), January 1997.

Stable range in formal power series with any number of indeterminates, American Mathematical Society (AMS), Annual Meeting, Orlando (USA), January 1996.

Rings with an almost division algorithm, American Mathematical Society (AMS), Annual Meeting, San Antonio (USA), January 1993.

Awards and honours
International White Cane Day award, Shahid Beheshti University, 2006

Khazaaeli Foundation, Distinguished Blind Scientists Award, Iran 2003

University of Social Welfare and Rehabilitation, physically impaired Scientist award, Iran 2002

Selected and funded by the National Federation of the Blind of America(NFB) as a distinguished blind mathematician to go to Capitol Hill (United States Congress) to meet congress representatives to support some bills regarding scientific educations for physically impaired people in America, USA 1992