- #1
tsaitea
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- TL;DR
- In this post on the Return function is indexed by k?
Where did the k come from? I was expecting the index to be t.
Reinforcement Learning - Return Function
- Thread starter tsaitea
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Where did the k come from? I was expecting the index to be t.
- #2
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##t## tells you the index of the first term you are summing over, so you can't sum over that. You need to sum over a new index, called a dummy index - they've chosen ##k##. Note that if you expand the sum, you will replace ##k## with 0 in the zeroth term, replace it with 1 in the first term, and so on - ##k## disappears when you expand the sum. If you'd summed over ##t##, ##t## would likewise be replaced and disappear when you expanded sum, which is not what you want.