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| ITNODE for triangulation | |
| array entry | definition | 
| ITNODE(1,I) | first vertex number | 
| ITNODE(2,I) | second vertex number | 
| ITNODE(3,I) | third vertex number | 
| ITNODE(4,I) | reserved for parallel processing | 
| ITNODE(5,I) | element label | 
| ITNODE for skeleton | |
| array entry | definition | 
| ITNODE(1,I) | first vertex number | 
| ITNODE(2,I) | first edge number | 
| ITNODE(3,I) | congruent region number | 
| ITNODE(4,I) | reserved for parallel processing | 
| ITNODE(5,I) | region label | 
| IBNDRY Array Definition | |
| array entry | definition | 
| IBNDRY(1,I) | first endpoint number | 
| IBNDRY(2,I) | second endpoint number | 
| IBNDRY(3,I) | curved edge switch | 
| IBNDRY(4,I) | edge type | 
| IBNDRY(5,I) | reserved for parallel processing | 
| IBNDRY(6,I) | reserved for parallel processing | 
| IBNDRY(7,I) | edge label | 
| Curved Edge Types | |
| IBNDRY(3,I) | curved edge type | 
| 0 | Straight edge | 
| 1 | Curved edge - circular arc | 
| −K | Curved edge - parametric | 
| Edge Type Definitions | |
| IBNDRY(4,I) | edge type | 
| 2 | Dirichlet boundary | 
| 1 | natural boundary | 
| 0 | internal | 
| −K | linked with edge K | 
| 3, 4, 5 | reserved for parallel processing | 
| SF for circular arc | |
| array entry | definition | 
| SF(1,I) | center coordinate xc | 
| SF(2,I) | center coordinate yc | 
| SF for parametric curve | |
| array entry | definition | 
| SF(1,I) | parametric coordinate s1 | 
| SF(2,I) | parametric coordinate s2 | 
| array entry | definition | 
| ITDOF(1,I) | degree of freedom for vertex ν1 | 
| ITDOF(2,I) | degree of freedom for vertex ν2 | 
| ITDOF(3,I) | degree of freedom for vertex ν3 | 
| ITDOF(4,I) | ± first degree of freedom for edge ϵ1 | 
| ITDOF(5,I) | ± first degree of freedom for edge ϵ2 | 
| ITDOF(6,I) | ± first degree of freedom for edge ϵ3 | 
| ITDOF(7,I) | first interior degree of freedom for element tI | 
| ITDOF(8,I) | polynomial degrees for element tI | 
| problem | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 
| simple pde | u | (ud) | (ω) | ||||
| obstacle problem | u | (ω) | |||||
| continuation problem | u | u0 | · u | · u0 | ψr | ψl | (ω) | 
| parameter identification | u | v | uλ | (ω) | |||
| distributed control | u | v | λ | (ω) | 
| array entry | root | root/leaf | internal | leaf | 
| IPATH(1,I) | neighbor | neighbor | neighbor | neighbor | 
| IPATH(2,I) | child | -edge | child | -edge | 
| IPATH(3,I) | vertex 1 | vertex 1 | ||
| IPATH(4,I) | vertex 2 | vertex 2 | ||
| IPATH(5,I) | ± edge | ± edge | ||
| IPATH(6,I) | degree | degree | 
| Parameters associated with n command | |||
| Name | Alias | Type | Value | 
| vname | n | short | maximum of 6 characters | 
| alias | a | short | maximum of 2 characters | 
| vtype | t | short | i (int), r (real), s (short), l (long), f (file) | 
| index | i | int | pointer to IU, RU, SU | 
| Parameters associated with s command | |||
| Name | Alias | Type | Value | 
| vname | n | short | variable name | 
| value | v | - | depends on vname | 
| label | l | long | label associated with value in radio buttons |