| (subclass Equation Proposition) | engineering.kif 150-150 | Equation est une sous-classe de proposition |
| (subclass DifferentialEquation Equation) | engineering.kif 154-154 | DifferentialEquation est une sous-classe de Equation |
| (subclass LinearEquation Equation) | engineering.kif 160-160 | LinearEquation est une sous-classe de Equation |
| (subclass NonlinearEquation Equation) | engineering.kif 164-164 | NonlinearEquation est une sous-classe de Equation |
| (subclass AlgebraicEquation Equation) | engineering.kif 168-168 | AlgebraicEquation est une sous-classe de Equation |
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