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(1) Schrodinger's equation describes how the wave function of a system changes over time, and appears to make the wave function continuous over time.

(2) When a measurement is made of quantity m, the wave function instantly changes to an eigenvector of the corresponding operator M. It seems that such a change would most likely be discontinuous in time.

It seems as though 2 contradicts 1, unless 1 were stated differently, eg 'Schrodinger's equation describes how a wave function changes over time,

*between observations*'. But the presentations of the postulates I have read don't state it that way, unless I missed it.

How can Schrodinger's equation be reconciled with wave function collapse?

Thanks for any answers!