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Gradient descent was invented before Minsky. Imo, Minsky produced some vague writings, with no significant practical impact, but this is enough for some people
by riku_iki 4y ago
Gradient descent was invented before Minsky. Imo, Minsky produced some vague writings, with no significant practical impact, but this is enough for some people to claim his founder's role in the field.
- masswerk 4y agoMinsky was actually a pioneer in the field, when it came to working with real networks. Compare [0] “A Neural-Analogue Calculator Based upon a Probability Model of Reinforcement”, Harvard University Psychological Laboratories, Cambridge, MA, January 8, 1952 [1] “Neural Nets and the Brain Model Problem”, Princeton Ph.D dissertation, 1954 In comparison, Frank Rosenblatt's Perceptron at Cornell was only built in 1958. Notably, Minsky's SNARC (1951) was the first learning neural network.
- riku_iki 4y ago> when it came to working with real networks. Compare my understanding is that that no one knows what that SNARK thing was, he built something on the grant, abandoned it shortly after that, and only many years later he and fanboys started using it as foundation of bold claims about his role in the field.
- masswerk 4y agoWell, his papers are out there to read.
- riku_iki 4y agoYes, and I read them: https://dspace.mit.edu/bitstream/handle/1721.1/6103/AIM-048.pdf?sequence=2&isAllowed=y https://dspace.mit.edu/bitstream/handle/1721.1/6103/AIM-048.... vague esssay without specifics
- masswerk 4y agoSo you may like better, > “Multiple simultaneous optimizers” search for a (local) maximum value of some function E(λ1, …, λn) of several parameters. Each unit Ui independently “jitters” its parameter λ1, perhaps randomly, by adding a variation δi(t) to a current mean value μi. The changes in the quantities λi and E are correlated, and the result is used to slowly change μi. The filters are to remove DC components. This technique, a form of coherent detection, usually has an advantage over methods dealing separately and sequentially with each parameter. (In “Steps”) :-)
- riku_iki 4y agocan you provide link, and what conclusions you derived from this text if your interest is meaningful discussion?
- masswerk 4y agoThe link has been already provided above (opus cit), it's directly connected to the very question of gradients, providing a specific implementation (it even comes with a circuit diagram). As you were claiming a lack of detail (but apparently not honoring the provided citation)… (The earlier you go back in the papers, the more specifics you will find.)