) to define state variables that the solver uses to trigger implicit events, which occur at a zero crossing of an indicator state variable if the implicit event condition changes from false to true.) to define state variables that the solver uses to trigger implicit events, which occur at a zero crossing of an indicator state variable if the implicit event condition changes from false to true.
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This behavior implies, for example, that an event of the type z > 0, where z is an indicator state, can be detected accurately because the zero crossing of z is found. But if the condition (in Event Conditions) is formulated as, for example, z > 1, the event is not triggered accurately.
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are written similarly as when defining Global Equations; for example, any global state variables or operators in the model can be used as well as the time or discrete state variables defined by the Events interface. However, the expressions cannot contain any indicator state variables. The nojac operator makes sure that the state variables do not enter into the Jacobian matrix, avoiding fill-in of the matrix.