National University of Computer and Emerging Sciences

output

20092026

most citedAn expanded evaluation of protein function prediction methods shows an improvement in accuracy

457 citations

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

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11 papers · 1 filter

math.CO2020★ 10 cited

Towards the Solution of an Extremal Problem Concerning the Wiener Polarity Index of Alkanes

Sadia Noureen, Akhlaq Ahmad Bhatti, Akbar Ali

The Wiener polarity index $W_{p}$ , one of the most studied molecular structure descriptors, was devised by the chemist Harold Wiener for predicting the boiling points of alkanes. The…

math.CO2019★ 5 cited

On the Extremal Zagreb Indices of $n$ -Vertex Chemical Trees with Fixed Number of Segments or Branching Vertices

Sadia Noureen, Akbar Ali, Akhlaq Ahmad Bhatti

Let $C T_{n, k}$ and $C T_{n, b}^{*}$ be the classes of all $n$ -vertex chemical trees with $k$ segments and $b$ branching vertices, respectively, where $3\le k\le n-1…

math.CO2018★ 5 cited

Algorithms for Computing Wiener Indices of Acyclic and Unicyclic Graphs

Bo Bi, Muhammad Kamran Jamil, Khawaja Muhammad Fahd +3

Let $G = (V (G), E (G))$ be a molecular graph, where $V (G)$ and $E (G)$ are the sets of vertices (atoms) and edges (bonds). A topological index of a molecular graph is a numerical quanti…

math.CO2016★ 16 cited

A note on the augmented Zagreb index of cacti with fixed number of vertices and cycles

Akbar Ali, Akhlaq Ahmad Bhatti

Let $C_{n, k}$ be the family of all cacti with $k$ cycles and $n \geq 4$ vertices. In the present note, the element of the class $C_{n, k}$ having minimum augmented…

math.CO2015★ 26 cited

Bond Incident Degree (BID) Indices of Polyomino Chains: A Unified Approach

A. Ali, Z. Raza, A. A. Bhatti

This work is devoted to establish a general expression for calculating the bond incident degree (BID) indices of polyomino chains and to characterize the extremal polyomino chains…

math.CO2014★ 4 cited

Some inequalities on the norms of special matrices with generalized Tribonacci and generalized Pell Padovan sequences

Zahid Raza, Muhammad Riaz, Muhammad Asim Ali

In this paper some properties of generalized tribonacci and generalized Padovan sequence are presented. Also the Euclidean norms of circulant, $r$ -circulant, semi-circulant and Han…

math.CO2014★ 23 cited

On the Augmented Zagreb Index

Akbar Ali, Zahid Raza, Akhlaq Ahmad Bhatti

Topological indices play an important role in mathematical chemistry especially in the quantitative structure-property relationship (QSPR) and quantitative structure-activity relat…

math.CO2014★ 16 cited

Further Inequalities Between Vertex-Degree-Based Topological Indices

Akbar Ali, Akhlaq Ahmad Bhatti, Zahid Raza

Continuing the recent work of L. Zhong and K. Xu [MATCH Commun. Math. Comput. Chem.71(2014) 627-642], we determine inequalities among several vertex-degree-based topological indice…

math.CO2014★ 15 cited

More on Comparison Between First Geometric-Arithmetic Index and Atom-Bond Connectivity Index

Zahid Raza, Akhlaq Ahmad Bhatti, Akbar Ali

The first geometric-arithmetic (GA) index and atom-bond connectivity (ABC) index are molecular structure descriptors which play a significant role in quantitative structure-propert…

math.CO2012

Infinite Log-Concavity and r-Factor

Zahid Raza, Anjum Iqbal

D. Uminsky and K. Yeats [6] studied the properties of the log- operator L on the subset of the finite symmetric sequences and prove the existence of an infinite region R, bounded b…

math.CO2010★ 1 cited

Generalizations of Nekrasov-Okounkov Identity

Amer Iqbal, Shaheen Nazir, Zahid Raza +1

Nekrasov-Okounkov identity gives a product representation of the sum over partitions of a certain function of partition hook length. In this paper we give several generalizations o…