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ISayMoo
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Re: If you are bored with Deep Networks

August 27th, 2019, 9:24 am

Fair point about the PDEs. But there's more to ML than naive attempts at PDE solving.
True; but ML-PDE js the talk of the town in the quant sphere.
What about using NLP for sentiment analysis in quant trading? That's also ML.
 
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ISayMoo
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Re: If you are bored with Deep Networks

August 27th, 2019, 9:25 am

PDE/ODE is an endangered species. And several MFE programmes demand such savoir faire for entry. And Python is easier to learn than C++ in this regard.
Do you need any programming language to learn PDE theory? It's maths.
 
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Cuchulainn
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Re: If you are bored with Deep Networks

August 27th, 2019, 2:57 pm

PDE/ODE is an endangered species. And several MFE programmes demand such savoir faire for entry. And Python is easier to learn than C++ in this regard.
Do you need any programming language to learn PDE theory? It's maths.
It's not necessary and probably not sufficient.

In solving optimisation problems in function spaces, Euler made extensive use of this `method of finite differences'. By replacing smooth curves by polygonal lines, he reduced the problem of finding extrema of a function to the problem of finding extrema of a function of n variables, and then he obtained exact solutions by passing to the limit as n ! 1. In this sense, functions can be regarded as `functions of infinitely many variables' (that is, the infinitely many values of x(t)at different points), and the calculus of variations can be regarded as the corresponding analog of differential calculus of functions of n real variables.
 
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Cuchulainn
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Re: If you are bored with Deep Networks

August 27th, 2019, 2:58 pm

Fair point about the PDEs. But there's more to ML than naive attempts at PDE solving.
True; but ML-PDE js the talk of the town in the quant sphere.
What about using NLP for sentiment analysis in quant trading? That's also ML.
Is it a black box? or more like HMM?
 
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ISayMoo
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Re: If you are bored with Deep Networks

August 27th, 2019, 4:04 pm

What is the definition of a "black box"?
 
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Cuchulainn
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Re: If you are bored with Deep Networks

August 27th, 2019, 8:04 pm

What is the definition of a "black box"?
I'll give it a go
 
1. One in which cannot interpret how input is processed to output
2. Given an output, how did we arrive at it (from primary and intermediate input).
3. (output is repeatable?) Black boxes that are not repeatable useful?(?)
4. The typical software system is a monolithic black box..

In software systems BB is well-established.
https://en.wikipedia.org/wiki/Black_box
 
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ISayMoo
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Re: If you are bored with Deep Networks

August 27th, 2019, 8:23 pm

1. Many ML models are relatively simple: construct a set of features and use them to train a linear or logistic regression "top model". They may be cumbersome to interpret due to the dimensionality of the data and feature space, but not difficult.

2. Is a question, not a requirement. What do you mean?

3. The output of a trained model is usually repeatable.
 
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Cuchulainn
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Re: If you are bored with Deep Networks

August 29th, 2019, 11:25 am

I usually respond to specific points that I understand. The problem is, often your points are vague and hard to understand. And you don't seem open to learning things. At least that's my impression.
Seems I am not alone. And I am talking about PDE-ML.
The threads on Numerical are much better as they attempt at least to run to completion.

Many ML articles are preaching to the converted. Each to his own, but ML/CS does not understand PDE. Look here (JohnLeM is a expert PDE guy)

https://forum.wilmott.com/viewtopic.php?f=34&t=101716
And the authors never respond.

You can't say we didn't try. 
"I am sure that, today, math is not necessary to machine learning and artificial intelligence. Indeed a mathematician can t understand what the hell they are doing ;) However I am pretty convinced that this is only a matter of time !"
 
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Cuchulainn
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Re: If you are bored with Deep Networks

August 29th, 2019, 11:35 am

I usually respond to specific points that I understand. The problem is, often your points are vague and hard to understand. And you don't seem open to learning things. At least that's my impression.
Seems I am not alone. And I am talking about PDE-ML.
The threads on Numerical are much better as they attempt at least to run to completion.

Many ML articles are preaching to the converted. Each to his own, but ML/CS does not understand PDE. Look here (JohnLeM is a expert PDE guy)

https://forum.wilmott.com/viewtopic.php?f=34&t=101716
And the authors never respond.

You can't say we didn't try. 
Anonymous quote
"I am sure that, today, math is not necessary to machine learning and artificial intelligence. Indeed a mathematician can t understand what the hell they are doing ;) However I am pretty convinced that this is only a matter of time !"
 
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ISayMoo
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Re: If you are bored with Deep Networks

August 30th, 2019, 4:58 pm

Completely disagree with it.
 
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FaridMoussaoui
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Re: If you are bored with Deep Networks

August 30th, 2019, 6:59 pm

anonymous quote --> Jean-Marc?
 
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Cuchulainn
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Re: If you are bored with Deep Networks

August 30th, 2019, 7:17 pm

Oui
 
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ISayMoo
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Re: If you are bored with Deep Networks

August 30th, 2019, 9:11 pm

Understanding ML requires a solid knowledge of mathematics. The theory behind the RBF kernels, for example, involves functional analysis and infinitely dimensional Hilbert spaces.
 
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bearish
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Re: If you are bored with Deep Networks

August 30th, 2019, 10:04 pm

I once did something bad in an infinite dimensional Hilbert space. As a step in an alleged proof I asserted that the closed unit ball was compact. Good thing I took the class pass/fail...
 
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katastrofa
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Re: If you are bored with Deep Networks

August 31st, 2019, 3:19 am

Understanding ML requires a solid knowledge of mathematics. The theory behind the RBF kernels, for example, involves functional analysis and infinitely dimensional Hilbert spaces.
And that's just for Deep Learning. Can you tell how many concepts from different disciplines one must know to understand Reinforcement Learning?
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