add auto gradient check design doc #3410
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typhoonzero
reviewed
Aug 11, 2017
doc/design/auto_gradient_check.md
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| ## auto gradient check Design | |||
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auto gradient check Design => Auto Gradient Check Design
doc/design/auto_gradient_check.md
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| ## Backgraound： | ||
| - Operator forward computing is easy to check if the result is right because it has a clear definition. **But** backpropagation is a notoriously difficult algorithm to debug and get right: | ||
| - **Firstly** you should get the right backpropagation formula according to the forward computation. |
doc/design/auto_gradient_check.md
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| - **Firstly** numeric gradient checker only need forward operator. | ||
| - **Secondly** user only need to prepare the input data for forward Operator. | ||
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| ## mathematical theory |
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Titles should Capitalize the first character.
wangkuiyi
approved these changes
Aug 11, 2017
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Fix #3353
here is better for review.