Publications for Iwan Jensen

• Prudent walks and polygons arXiv:0810.3137
  J. C. Dethridge, T. M. Garoni, A. J. Guttmann and I.Jensen, submitted to J. Phys. A
• A parallel algorithm for the enumeration of benzenoid hydrocarbons arXiv:0808.0963
  I. Jensen, submitted to J. Stat. Mech..
• Experimental mathematics on the magnetic susceptibility of the square lattice Ising model arXiv:0808.0763
  S. Boukraa, A. J. Guttmann, S. Hassani, I. Jensen, J.-M. Maillard, B. Nickel and N. Zenine, J. Phys. A. 41 455202 (2008) (51pp).
• Role of pulling direction in understanding the energy landscape of proteins arXiv:0806.4677
  R. Rajesh, D. Giri, I. Jensen and S. Kumar, Phys. Rev E 78 021905 (2008) (8pp).
• Modeling force-induced bio-polymer unfolding arXiv:0711.3482
  A. J. Guttmann, J. L. Jacobsen, I. Jensen and S. Kumar, J. Math. Chem. (to appear).
  Contribution to the symposium "Lattices and Trajectories", celebrating the careers of Stu Whittington and Ray Kapral. 
• Exact perimeter generating function for a model of punctured staircase polygons arXiv:cond-mat/0610605v2
  I. Jensen and A. Rechnitzer, J. Phys. A: Math. Theor. 41 215002 (2008) (12pp) . 
• Area distribution and scaling function for punctured polygons math.CO/0701633
  C. Richard, I. Jensen and A. J. Guttmann, Elec. J. Comb. 15(1), R53 (2008) (50pp). 
• Exact generating function for 2-convex polygons arXiv:0805.1259.
  W. R. G. James, I. Jensen and A. J. Guttmann, J. Phys. A: Math. Theor. 41 055001 (2008) (26pp)
  An extended version with more results ``Families of m-convex polygons: m=2." can be found here arXiv:0710.4606

• Role of conformational entropy in force-induced bio-polymer unfolding cond-mat/0702436
  S. Kumar, I. Jensen, J. L. Jacobsen and A. J. Guttmann, Phys. Rev. Lett. 98, 128101 (2007). 

• Universal amplitude ratio Γ^-/Γ⁺ for two-dimensional percolation. cond-mat/0607146
  I. Jensen and R. M. Ziff, Phys. Rev. E 74, 020101(R) (2006) (4 pages). 
• Honeycomb lattice polygons and walks as a test of series analysis techniques. cond-mat/0510724
  I. Jensen, J. Phys: Conf. Ser. 42, 163-178 (2006).
  Presented at "Counting Complexity: An international workshop on statistical mechanics and combinatorics." In celebration of Prof. Tony Guttmann's 60th birthday. 
• Exact solution of two planar polygon models
  A. J. Guttmann and I. Jensen, Differential Geometry and Physics, Nankai Tracts in Mathematics - Vol 10, p221-231 (2006). Proceedings of the 23rd International Conference of Differential Geometric Methods in Theoretical Physics, Tianjin, China, 20-26 August 2005. Editors: Mo-lin Ge and Weiping Zhang  
• The perimeter generating function of punctured staircase polygons cond-mat/0603833
  A. J. Guttmann and I. Jensen, J. Phys. A 39, 3871-3882 (2006). 
• Fuchsian differential equation for the perimeter generating function of three-choice polygons math.CO/0506317
  A. J. Guttmann and I. Jensen, Séminaire Lotharingien de Combinatoire 54, Article B54c (2006). 

• Perimeter generating functions for the mean-squared radius of gyration of convex polygons cond-mat/0509714
  I. Jensen, J. Phys. A. 38, L769-L775 (2005). 
• Correction-to-scaling exponents for two-dimensional self-avoiding walks cond-mat/0409355
  S. Caracciolo, A. J. Guttmann, I. Jensen, A. Pelissetto, A. N. Rogers, and A. D. Sokal, J. Stat. Phys. 120, 1037-1100 (2005).  
• Self-avoiding walks crossing a square cond-mat/0506341
  M. Bousquet-Mélou, A. J. Guttmann and I. Jensen, J. Phys. A 38, 9159-9181 (2005). 
• Low-density series expansions for directed percolation IV. Temporal disorder cond-mat/0509713
  I. Jensen, J. Phys. A 38, 1441-1449 (2005). 

• Improved lower bounds on the connective constants for two-dimensional self-avoiding walks cond-mat/0409381
  I. Jensen, J. Phys. A 37, 11521-11529 (2004). 
• Self-avoiding walks and polygons on the triangular lattice cond-mat/0409039
  I. Jensen, J. Stat. Mech., P10008 (2004). 
• Scaling prediction for self-avoiding polygons revisited cond-mat/0406027
  C. Richard, I. Jensen, and A. J. Guttmann, J. Stat. Mech., P08007 (2004). 
• Low-density series expansions for directed percolation III. Some two-dimensional lattices cond-mat/0405504
  I. Jensen, J. Phys. A 37, 6899-6915 (2004). 
• Enumeration of self-avoiding walks on the square lattice cond-mat/0404728
  I. Jensen, J. Phys. A 37, 5503-5524 (2004). 

• Counting polyominoes: A parallel implementation for cluster computing
  I. Jensen, Lecture Notes in Computer Science, 2659, 203-212 (2003).  
• A parallel algorithm for the enumeration of self-avoiding polygons on the square lattice
  I. Jensen, J. Phys. A 36, 5731-5745 (2003). 
• Scaling function for self-avoiding polygons cond-mat/0302513
  C. Richard, I. Jensen, and A. J. Guttmann,
  TH2002: Proceedings of the International Congress on Theoretical Physics (Paris),
  ed. D. Iagolnitzer, V. Rivasseau and J. Zinn-Justin, (Basel:Birkhäuser), p267-277 (2003). 

• On the number of benzenoid hydrocarbons
  M. Vöge, A. J. Guttmann and I. Jensen, J. Chem. Inf. Comput. Sci., 42, 456-466 (2002). 
• Percolation and epidemics in a two-dimensional small world
  M. E. J. Newman, I. Jensen and R. M. Ziff, Phys. Rev. E, 65, 021904 (2002). 

• Enumeration of compact self-avoiding walks
  I. Jensen, Comput. Phys. Commun., 142, 109-113 (2001). 
• Osculating and neighbour-avoiding polygons on the square lattice
  I. Jensen, J. Phys. A 34, 7979-7990 (2001). 
• Scaling function and universal amplitude combinations for self-avoiding polygons
  C. Richard, A. J. Guttmann and I. Jensen, J. Phys. A 34, L495-L501 (2001). 
• Polygonal polyominoes on the square lattice
  A. J. Guttmann, I. Jensen and A. L. Owczarek, J. Phys. A 34, 3721-3733 (2001). 
• Enumerations of lattice animals and trees
  I. Jensen, J. Stat. Phys. 102, 865-881 (2001). 

• A transfer matrix approach to the enumeration of plane meanders
  I. Jensen, J. Phys. A 33, 5953-5963 (2000). 
• Statistics of lattice animals (polyominoes) and polygons
  I. Jensen and A. J. Guttmann, J. Phys. A 33, L257-L263 (2000). 
• Critical exponents of plane meanders
  I. Jensen and A. J. Guttmann, J. Phys. A 33, L187-L192 (2000). 
• Size and area of square lattice polygons
  I. Jensen, J. Phys. A 33, 3533-3543 (2000). 
• Punctured polygons and polyominoes on the square lattice
  A. J. Guttmann, I. Jensen, L. H. Wong and I. G. Enting, J. Phys. A 33, 1735-1764 (2000). 

• Low-density series expansions for directed percolation II. The square lattice with a wall.
  I Jensen , J. Phys. A 32, 6055-6062 (1999). 
• Low-density series expansions for directed percolation I. 
  A new efficient algorithm with applications to the square lattice.
  I Jensen , J. Phys. A 32, 5233-5249 (1999). 
• Self-avoiding polygons on the square lattice
  I Jensen and A. J. Guttmann, J. Phys. A 32, 4867-4876 (1999). 

• Self-avoiding walks, neighbour-avoiding walks and trails on semiregular lattices
  I Jensen and A J Guttmann, J. Phys. A 31, 8137-8145 (1998). 
• Study of the Potts model on the honeycomb and triangular lattices:
  Low-temperature series and partition function zeros
  H Feldmann, A J Guttmann, I Jensen, R Shrock and S-H Tsa,
  J. Phys. A 31, 2287-2310 (1998). 

• Series expansions for the percolation probability of a generalized Domany-Kinzel cellular automaton
  I Jensen, J. Phys. A 30, 8471-8478 (1997). 
• The Potts model on kagome and honeycomb lattices
  I Jensen, A J Guttmann, and I G Enting, J. Phys. A 30, 8067-8083 (1997). 

• Temporally disordered bond percolation on the directed square lattice.
  I Jensen, Phys. Rev. Lett. 77, 4988-4991 (1996). 
• Low-density series expansions for directed percolation on square and triangular lattices
  I Jensen, J. Phys. A 29, 7013-7040 (1996). 
• Extrapolation procedure for low-temperature series for the square lattice spin-1 Ising model
  I Jensen and A J Guttmann, J. Phys. A 29, 3817-3836 (1996).  
• Low-temperature series expansions for the square lattice Ising model with spin S > 1
  I Jensen, I G Enting, and A J Guttmann, J. Phys. A 29, 3805-3815 (1996). 
• Directed percolation near a wall .
  J W Essam, A J Guttmann, I Jensen and D TanlaKishani, 
  J. Phys. A 29, 1619-1628 (1996). 
• Series expansions of the percolation probability on the directed triangular lattice
  I Jensen and A J Guttmann, J. Phys. A 29, 497 (1996). 
• The finite lattice method of series expansions.
  I Jensen, I G Enting, and A J Guttmann, in Computational Techniques and Applications: CTAC95, Eds. R L May and A K Easton, (World Scientific, Singapore), 411-417 (1996). 
• Series expansions for two-dimensional directed percolation.
  I Jensen and A J Guttmann, Nucl. Phys. B (Proc. Suppl.) 47, 835-837 (1996). 

• Series expansions of the percolation probability for directed square and honeycomb lattices.
  I Jensen and A J Guttmann, J. Phys. A 28, 4813-4833 (1995).  

• Low-temperature series expansions for the spin-1 Ising model.
  I G Enting, A J Guttmann, and I Jensen, J. Phys. A 27, 6987-7006 (1994).  
• Critical exponents for branching annihilating random walks with an even number of offspring.
  I Jensen, Phys. Rev. E 50, 3623-3634 (1994). 
• Critical behavior of nonequilibrium models with infinitely many absorbing states.
  I Jensen, Int. J. Mod. Phys. B8, 3299-3311 (1994).  
• Series analysis of the generalized contact process.
  I Jensen and R Dickman, Physica A203, 175-188 (1994). 
• Critical behaviour of a surface reaction model with infinitely many absorbing states.
  I Jensen, J. Phys. A 27, L61-68 (1994). 

• Conservation laws and universality in branching annihilation random walks.
  I Jensen, J. Phys. A 26, 3921-3930 (1993). 
• Nonequilibrium phase transitions in systems with infinitely many absorbing states.
  I Jensen and R Dickman, Phys. Rev. E 48, 1710-1725 (1993). 
• Critical behavior of the pair contact process.
  I Jensen, Phys. Rev. Lett. 70, 1465-1468 (1993). 
• Time-dependent perturbation theory for diffusive nonequilibrium lattice models.
  I Jensen and R Dickman, J. Phys. A 26, L151-157 (1993). 
• Time-dependent perturbation theory for nonequilibrium lattice models.
  I Jensen and R Dickman, J. Stat. Phys. 71, 89-127 (1993). 
• Critical behavior of branching annihilating random walks with an odd number of offsprings.
  I Jensen, Phys. Rev. E 47, R1 (1993). 

• Scaling analysis of time-dependent simulations of the three-dimensional contact process
  I Jensen, Phys. Rev. A 46, 7393-7400 (1992). 
• Critical behavior of the three-dimensional contact process.
  I Jensen, Phys. Rev. A 45, R563-566 (1992). 

• Time-dependent perturbation theory for nonequilibrium lattice models.
  R Dickman and I Jensen, Phys. Rev. Lett. 67, 2391-2394 (1991). 
• Random sequential adsorption: Series and virial expansions.
  R Dickman, J-S Wang and I Jensen, J. Chem. Phys. 94, 8252-8257.(1991). 
• Non-equilibrium critical behaviour on fractal lattices.
  I Jensen, J. Phys. A 24, L1111-1117 (1991). 
• Universality class of a one-dimensional cellular automaton.
  I Jensen, Phys. Rev. A 43, 3187-3189 (1991). 
• Kinetic phase transitions in a surface-reaction model with diffusion: Computer simulations and mean-field theory.
  I Jensen and H C Fogedby, Phys. Rev. A 42, 1969-1975 (1991). 

• Critical exponents for an irreversible surface reaction model.
  I Jensen, H C Fogedby and R Dickman, Phys. Rev. A 41, 3411-3414 (1990).