Fair concerns, thank you for clarifying the notation, you are correct in my misuse of model/chain. Was typing fast :) After some further reading , I also agre

Fair concerns, thank you for clarifying the notation, you are correct in my misuse of model/chain. Was typing fast :) After some further reading , I also agree re: martingales. To be honest I have only ever encountered them in the common discreet-time situation.