... package

<#22#>This work was supported by the Society for Industrial and Applied Mathematics, Philadelphia, Pennsylvania.<#22#>

... Duggan

<#457#>Composition Department, Society for Industrial and Applied Mathematics, 3600 Univeristy City Science Center, Philadelphia, Pennsylvania, 19104-2688 (<#23#>duggan@siam.org<#23#>).<#457#>

... Thors

<#24#>Various Affiliations, supported by various foundation grants.<#24#>