Fan Chung received her PhD from University of Pennsylvania in 1974. She is a Distinguished Professor of Mathematics, Professor of Computer Science and Engineering, and the Paul Erdos Professor in Combinatorics at the University of California, San Diego. She has written three books, Spectral Graph Theory, Complex Graphs and Networks (with Lincoln Lu), and Erdos on Graphs (with Ron Graham) and almost 300 papers. She is a member of the American Academy of Arts and Sciences, is an academician of Academic Sinica, and is a fellow of the American Mathematical Society and the Society for Industrial and Applied Mathematics. Her website is http://math.ucsd.edu/~fan/.Ron Graham received his Ph. D. from the University of California at Berkeley in1962. He holds the Irvin and Joan Jacobs Endowed Chair Professorship in the Computer Science and Engineering department of University of California at San Diego and was formerly at AT&T Bell Laboratories and Rutgers University. He has more than 350 publications. He is a member of the National Academy of Sciences and is a Fellow of the Association of Computing Machinery and the American Mathematical Society. He was the president of the American Mathematical Society from 1993 to 1995 and the president of the Mathematical Association of America from 2003 to 2005. His website is https://cseweb.ucsd.edu/~rgraham/.Frederick Hoffman received his PhD from University of Virginia in 1964. He was a Founding Fellow of The Institute of Combinatorics and its Applications and serves on its Council. He has directed thirty-nine of the Southeastern International Conferences on Combinatorics, Graph Theory and Computing. He served as President and Governor of the Florida Section of the Mathematical Association of America and chaired the national MAA committee on mini-courses. He has published more than 20 papers. His website is http://www.math.fau.edu/people/faculty/hoffman.php.Leslie Hogben received her PhD from Yale in 1978. She is the Dio Lewis Holl Chair in Applied Mathematics, a Professor of Mathematics, and an Associate Dean of the College of Liberal Arts and Sciences at Iowa State University, and the Associate Director for Diversity of the American Institute of Mathematics. She is the author of more than 100 papers and is the editor of the books Handbook of Linear Algebra and Recent Trends in Combinatorics (with Andrew Beveridge, Jerrold R. Griggs, Gregg Musiker, Presad Tetali). She serves on the Scientific Review Panel of the Atlantic Association for Mathematical Research (Canada) and the editorial boards of several journals. Her webpage is https://orion.math.iastate.edu/lhogben/homepage.html.Ronald C. Mullin received his PhD from the University of Waterloo in 1964.He is a Distinguished Professor of Combinatorics and Optimization (Emeritus)at University of Waterloo and Professor of Mathematics Emeritus at Florida Atlantic University. He is the author of more than 180 papers. He is the first recipient of the Stanton Medal, which is awarded by the Institute for Combinatorics and its Applications (ICA). His website is https://uwaterloo.ca/combinatorics-and-optimization/about/people/rcmullin.Douglas B. West received his PhD from MIT in 1978. After retiring from the faculty at the University of Illinois, in 2012 he moved to Zhejiang Normal University under the 1000 Talents Plan. He has written about 250 papers and the books Introduction to Graph Theory and Combinatorial Mathematics. He is the Editor-in-Chief of the journal Discrete Mathematics and an Associate Editor of Order and the American Mathematical Monthly. His website is https://faculty.math.illinois.edu/~west/.

• Personal Reflections of the SEICCGTC: Origins and BeyondI: CombinatoricsSome of My Favorite ProblemsVariations on the Sequenceable ThemeSurvey of Stack Sortable PermutationsDimensions for Posets and Chromatic Number for GraphsEdros MagicII: Graph TheoryDevelopments on Saturated GraphsMagic Labeling BasicsBlock Colorings of Graph DecompositionsReconfiguration of Colourings and Dominating Sets in GraphsEdge Intersection Graphs of Paths on a GridIII: Combinatorial Matrix TheoryA Jaunt in Spectral Graph TheoryInverse Eigenvalue Problem of a GraphRank FunctionsPermutation Matrices and Beyond: An EssayIV: Designs, Geometry, Packing and CoveringSome New Families of 2-ResolutionsGraphical DesignsThere Must be Fifty Ways to Miss a CoverCombinatorial Designs and Cryptography, RevisitedA Survey of Scalar Multiplication AlgorithmsArcs, Caps, Generalisations: Results and Problems

Fan Chung received her PhD from University of Pennsylvania in 1974. She is a Distinguished Professor of Mathematics, Professor of Computer Science and Engineering, and the Paul Erdos Professor in Combinatorics at the University of California, San Diego. She has written three books, Spectral Graph Theory, Complex Graphs and Networks (with Lincoln Lu), and Erdos on Graphs (with Ron Graham) and almost 300 papers. She is a member of the American Academy of Arts and Sciences, is an academician of Academic Sinica, and is a fellow of the American Mathematical Society and the Society for Industrial and Applied Mathematics. Her website is http://math.ucsd.edu/~fan/.Ron Graham received his Ph. D. from the University of California at Berkeley in1962. He holds the Irvin and Joan Jacobs Endowed Chair Professorship in the Computer Science and Engineering department of University of California at San Diego and was formerly at AT&T Bell Laboratories and Rutgers University. He has more than 350 publications. He is a member of the National Academy of Sciences and is a Fellow of the Association of Computing Machinery and the American Mathematical Society. He was the president of the American Mathematical Society from 1993 to 1995 and the president of the Mathematical Association of America from 2003 to 2005. His website is https://cseweb.ucsd.edu/~rgraham/.Frederick Hoffman received his PhD from University of Virginia in 1964. He was a Founding Fellow of The Institute of Combinatorics and its Applications and serves on its Council. He has directed thirty-nine of the Southeastern International Conferences on Combinatorics, Graph Theory and Computing. He served as President and Governor of the Florida Section of the Mathematical Association of America and chaired the national MAA committee on mini-courses. He has published more than 20 papers. His website is http://www.math.fau.edu/people/faculty/hoffman.php.Leslie Hogben received her PhD from Yale in 1978. She is the Dio Lewis Holl Chair in Applied Mathematics, a Professor of Mathematics, and an Associate Dean of the College of Liberal Arts and Sciences at Iowa State University, and the Associate Director for Diversity of the American Institute of Mathematics. She is the author of more than 100 papers and is the editor of the books Handbook of Linear Algebra and Recent Trends in Combinatorics (with Andrew Beveridge, Jerrold R. Griggs, Gregg Musiker, Presad Tetali). She serves on the Scientific Review Panel of the Atlantic Association for Mathematical Research (Canada) and the editorial boards of several journals. Her webpage is https://orion.math.iastate.edu/lhogben/homepage.html.Ronald C. Mullin received his PhD from the University of Waterloo in 1964.He is a Distinguished Professor of Combinatorics and Optimization (Emeritus)at University of Waterloo and Professor of Mathematics Emeritus at Florida Atlantic University. He is the author of more than 180 papers. He is the first recipient of the Stanton Medal, which is awarded by the Institute for Combinatorics and its Applications (ICA). His website is https://uwaterloo.ca/combinatorics-and-optimization/about/people/rcmullin.Douglas B. West received his PhD from MIT in 1978. After retiring from the faculty at the University of Illinois, in 2012 he moved to Zhejiang Normal University under the 1000 Talents Plan. He has written about 250 papers and the books Introduction to Graph Theory and Combinatorial Mathematics. He is the Editor-in-Chief of the journal Discrete Mathematics and an Associate Editor of Order and the American Mathematical Monthly. His website is https://faculty.math.illinois.edu/~west/.

• Personal Reflections of the SEICCGTC: Origins and BeyondI: CombinatoricsSome of My Favorite ProblemsVariations on the Sequenceable ThemeSurvey of Stack Sortable PermutationsDimensions for Posets and Chromatic Number for GraphsEdros MagicII: Graph TheoryDevelopments on Saturated GraphsMagic Labeling BasicsBlock Colorings of Graph DecompositionsReconfiguration of Colourings and Dominating Sets in GraphsEdge Intersection Graphs of Paths on a GridIII: Combinatorial Matrix TheoryA Jaunt in Spectral Graph TheoryInverse Eigenvalue Problem of a GraphRank FunctionsPermutation Matrices and Beyond: An EssayIV: Designs, Geometry, Packing and CoveringSome New Families of 2-ResolutionsGraphical DesignsThere Must be Fifty Ways to Miss a CoverCombinatorial Designs and Cryptography, RevisitedA Survey of Scalar Multiplication AlgorithmsArcs, Caps, Generalisations: Results and Problems

Fan Chung received her PhD from University of Pennsylvania in 1974. She is a Distinguished Professor of Mathematics, Professor of Computer Science and Engineering, and the Paul Erdos Professor in Combinatorics at the University of California, San Diego. She has written three books, Spectral Graph Theory, Complex Graphs and Networks (with Lincoln Lu), and Erdos on Graphs (with Ron Graham) and almost 300 papers. She is a member of the American Academy of Arts and Sciences, is an academician of Academic Sinica, and is a fellow of the American Mathematical Society and the Society for Industrial and Applied Mathematics. Her website is http://math.ucsd.edu/~fan/.Ron Graham received his Ph. D. from the University of California at Berkeley in1962. He holds the Irvin and Joan Jacobs Endowed Chair Professorship in the Computer Science and Engineering department of University of California at San Diego and was formerly at AT&T Bell Laboratories and Rutgers University. He has more than 350 publications. He is a member of the National Academy of Sciences and is a Fellow of the Association of Computing Machinery and the American Mathematical Society. He was the president of the American Mathematical Society from 1993 to 1995 and the president of the Mathematical Association of America from 2003 to 2005. His website is https://cseweb.ucsd.edu/~rgraham/.Frederick Hoffman received his PhD from University of Virginia in 1964. He was a Founding Fellow of The Institute of Combinatorics and its Applications and serves on its Council. He has directed thirty-nine of the Southeastern International Conferences on Combinatorics, Graph Theory and Computing. He served as President and Governor of the Florida Section of the Mathematical Association of America and chaired the national MAA committee on mini-courses. He has published more than 20 papers. His website is http://www.math.fau.edu/people/faculty/hoffman.php.Leslie Hogben received her PhD from Yale in 1978. She is the Dio Lewis Holl Chair in Applied Mathematics, a Professor of Mathematics, and an Associate Dean of the College of Liberal Arts and Sciences at Iowa State University, and the Associate Director for Diversity of the American Institute of Mathematics. She is the author of more than 100 papers and is the editor of the books Handbook of Linear Algebra and Recent Trends in Combinatorics (with Andrew Beveridge, Jerrold R. Griggs, Gregg Musiker, Presad Tetali). She serves on the Scientific Review Panel of the Atlantic Association for Mathematical Research (Canada) and the editorial boards of several journals. Her webpage is https://orion.math.iastate.edu/lhogben/homepage.html.Ronald C. Mullin received his PhD from the University of Waterloo in 1964.He is a Distinguished Professor of Combinatorics and Optimization (Emeritus)at University of Waterloo and Professor of Mathematics Emeritus at Florida Atlantic University. He is the author of more than 180 papers. He is the first recipient of the Stanton Medal, which is awarded by the Institute for Combinatorics and its Applications (ICA). His website is https://uwaterloo.ca/combinatorics-and-optimization/about/people/rcmullin.Douglas B. West received his PhD from MIT in 1978. After retiring from the faculty at the University of Illinois, in 2012 he moved to Zhejiang Normal University under the 1000 Talents Plan. He has written about 250 papers and the books Introduction to Graph Theory and Combinatorial Mathematics. He is the Editor-in-Chief of the journal Discrete Mathematics and an Associate Editor of Order and the American Mathematical Monthly. His website is https://faculty.math.illinois.edu/~west/.

• Personal Reflections of the SEICCGTC: Origins and BeyondI: CombinatoricsSome of My Favorite ProblemsVariations on the Sequenceable ThemeSurvey of Stack Sortable PermutationsDimensions for Posets and Chromatic Number for GraphsEdros MagicII: Graph TheoryDevelopments on Saturated GraphsMagic Labeling BasicsBlock Colorings of Graph DecompositionsReconfiguration of Colourings and Dominating Sets in GraphsEdge Intersection Graphs of Paths on a GridIII: Combinatorial Matrix TheoryA Jaunt in Spectral Graph TheoryInverse Eigenvalue Problem of a GraphRank FunctionsPermutation Matrices and Beyond: An EssayIV: Designs, Geometry, Packing and CoveringSome New Families of 2-ResolutionsGraphical DesignsThere Must be Fifty Ways to Miss a CoverCombinatorial Designs and Cryptography, RevisitedA Survey of Scalar Multiplication AlgorithmsArcs, Caps, Generalisations: Results and Problems