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memorize the attained minimum over time in ODE

• To: mathgroup at smc.vnet.net
• Subject: [mg90721] memorize the attained minimum over time in ODE
• From: Joerg Schaber <schaber at molgen.mpg.de>
• Date: Mon, 21 Jul 2008 04:29:07 -0400 (EDT)

Hi,

I have an ODE that solves at each time step n something like

y'(n)=f(y(n-1),Min(y(n),y(n-1))

i.e., y' depends on the Minimum of y attained so far.

How do I implement that usind NDSolve? I cannot use algebraic equations,
because I used Method->StiffnessSwitching.

Thanks,

joerg