## Contents of Volume 49, Number 180

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- New convergence estimates for multigrid algorithms
- James H. Bramble and Joseph E. Pasciak PDF
- Math. Comp.
**49**(1987), 311-329

- Error estimates for spatially discrete approximations of semilinear parabolic equations with nonsmooth initial data
- Claes Johnson, Stig Larsson, Vidar Thomée and Lars B. Wahlbin PDF
- Math. Comp.
**49**(1987), 331-357

- On the discretization in time of semilinear parabolic equations with nonsmooth initial data
- Michel Crouzeix and Vidar Thomée PDF
- Math. Comp.
**49**(1987), 359-377

- A third-order boundary condition for the exterior Stokes problem in three dimensions
- Georges H. Guirguis PDF
- Math. Comp.
**49**(1987), 379-389

- The F-E-M test for convergence of nonconforming finite elements
- Zhong Ci Shi PDF
- Math. Comp.
**49**(1987), 391-405

- Convergence of a vortex in cell method for the two-dimensional Euler equations
- G.-H. Cottet PDF
- Math. Comp.
**49**(1987), 407-425

- On the convergence of a finite element method for a nonlinear hyperbolic conservation law
- Claes Johnson and Anders Szepessy PDF
- Math. Comp.
**49**(1987), 427-444

- Convergence theorem for difference approximations of hyperbolic quasilinear initial-boundary value problems
- Daniel Michelson PDF
- Math. Comp.
**49**(1987), 445-459

- On the convergence of collocation methods for boundary integral equations on polygons
- Martin Costabel and Ernst P. Stephan PDF
- Math. Comp.
**49**(1987), 461-478

- The boundary element numerical method for two-dimensional linear quadratic elliptic problems. I. Neumann control
- Goong Chen and Ying-Liang Tsai PDF
- Math. Comp.
**49**(1987), 479-498

- Asymptotic theory of filtering for linear operator equations with discrete noisy data
- C. W. Groetsch and C. R. Vogel PDF
- Math. Comp.
**49**(1987), 499-506

- An a posteriori parameter choice for ordinary and iterated Tikhonov regularization of ill-posed problems leading to optimal convergence rates
- Helmut Gfrerer PDF
- Math. Comp.
**49**(1987), 507-522

- Numerical solution of stochastic differential equations with constant diffusion coefficients
- Chien Cheng Chang PDF
- Math. Comp.
**49**(1987), 523-542

- Two-step methods and bi-orthogonality
- A. Iserles and S. P. Nørsett PDF
- Math. Comp.
**49**(1987), 543-552

- $P$-stable Obrechkoff methods with minimal phase-lag for periodic initial value problems
- U. Anantha Krishnaiah PDF
- Math. Comp.
**49**(1987), 553-559

- Eigenvalue finite difference approximations for regular and singular Sturm-Liouville problems
- Nabil R. Nassif PDF
- Math. Comp.
**49**(1987), 561-580

- On the characterization of $q$-superlinear convergence of quasi-Newton methods for constrained optimization
- J. Stoer and R. A. Tapia PDF
- Math. Comp.
**49**(1987), 581-584

- Some inequalities for continued fractions
- R. M. Dudley PDF
- Math. Comp.
**49**(1987), 585-593

- A table of elliptic integrals of the second kind
- B. C. Carlson PDF
- Math. Comp.
**49**(1987), 595-606

- Bi-cyclide and flat-ring cyclide coordinate surfaces: correction of two expressions
- Philip W. Kuchel, Brian T. Bulliman and Edward D. Fackerell PDF
- Math. Comp.
**49**(1987), 607-613

- Calculation of the class numbers of imaginary cyclic quartic fields
- Kenneth Hardy, R. H. Hudson, D. Richman, Kenneth S. Williams and N. M. Holtz PDF
- Math. Comp.
**49**(1987), 615-620

- Perfect multiple error-correcting arithmetic codes
- Daniel M. Gordon PDF
- Math. Comp.
**49**(1987), 621-633

- Integer squares with constant second difference
- Duncan A. Buell PDF
- Math. Comp.
**49**(1987), 635-644

- Reviews and Descriptions of Tables and Books
- Math. Comp.
**49**(1987), 645-649

- Table Errata
- Math. Comp.
**49**(1987), 651-653