Who discovered backpropagation?

Related questions

1. What is the difference between gradient descent and steepest descent?
2. Why is it called backpropagation?
3. Who invented backpropagation?
4. What is momentum in gradient descent?
5. What is Nesterov momentum?
6. What controls the magnitude of a step taken during gradient descent in machine learning?
7. Is simulated annealing machine learning?
8. Why does simulated annealing work?
9. What does Optimizer do in neural network?
10. Why do we simulate annealing?

Tags

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2. #people
3. #already
4. #invented
5. #since
6. #werbos
7. #rumelhart
8. #algorithm
9. #known
10. #times
11. #paper
12. #often
13. #couple
14. #discovered
15. #backpropagation
16. #wikipedia