SERVING THE QUANTITATIVE FINANCE COMMUNITY

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by katastrofa
Yesterday, 10:17 pm
Forum: Off Topic
Topic: My very own Panama papers
Replies: 7
Views: 212

My very own Panama papers

I have a one-person business, but so far I preferred to work as a contractor, invoicing everything as a person - doing taxes was faster. Recently, I've gotten a contract on a high-cool-factor project. Someone (who themselves don't have any experience in this kind of matters) suggested that it could ...
by katastrofa
Yesterday, 9:23 pm
Forum: Off Topic
Topic: Random photo's
Replies: 1771
Views: 59253

Re: Random photo's

Those d(x1, x2) thingies look like metrics? (or similarity measures in AI). That (x1 - x2)^2 looks suspicious. He an evangelist for some technology? He is very flambuoyant, what? .// Flipovers suck. I just don't know what he's teaching. But there is so much to comment about this picture e.g. the gu...
by katastrofa
Yesterday, 6:10 am
Forum: Off Topic
Topic: Nouvelles de France
Replies: 2143
Views: 69717

Re: Nouvelles de France

Gamal wrote:
Withdraw money from my account.

The EU money?
by katastrofa
January 21st, 2018, 6:03 pm
Forum: Off Topic
Topic: UK going to the dogs
Replies: 4136
Views: 327607

Re: UK going to the dogs

"While experts suggest there are no gender differences in mathematical ability, Sarah Hart, maths professor at Birkbeck, University of London, said she had noticed that female students double-checked their answers before suggesting them in class." I used to double-check my work too... I do...
by katastrofa
January 21st, 2018, 5:47 pm
Forum: Off Topic
Topic: Machine learning for fun, to pay your rent or whatever
Replies: 156
Views: 3402

Re: Machine learning for fun, to pay your rent or whatever

I just wrote that the KL divergence doesn't satisfy not only #2 (symmetry condition), but also #3 (triangle rule).
by katastrofa
January 20th, 2018, 11:01 pm
Forum: Off Topic
Topic: Your rants here
Replies: 461
Views: 15112

Re: Your rants here

Sounds restless, unsatisfied. You need a new mental obsession or inspiration? Maybe watch some technical YouTube videos on topics that interest you but didnt have time for so far? It never goes well. I planted a hydroponic mini-garden when I was ill and bored over X-mas. The big guy (with big burni...
by katastrofa
January 20th, 2018, 10:14 pm
Forum: Off Topic
Topic: Your rants here
Replies: 461
Views: 15112

Re: Your rants here

I don't know what has come over me. I'm hungry all evening and develop short-lived cravings for tiny bits of all sorts of foods: several sunflower seeds, cooked carrots, one tomatino, a few raisins, half an apple... now I remembered about capers in the fridge. I feel like I'll get sick soon, but I'm...
by katastrofa
January 20th, 2018, 9:51 pm
Forum: Off Topic
Topic: The Black Cube - Art Gallery
Replies: 455
Views: 100599

Re: The Black Cube - Art Gallery

I have a whole collection of pictures I take of my son the moment I tell him how expensive modern art is, ...the type of art you can make in 3 minutes. Here he's watching a white square called "Ledger" by Robert Ryman, valued maybe at $20.000.000 https://www.sitmo.com/wp-content/uploads/2...
by katastrofa
January 20th, 2018, 9:47 pm
Forum: Off Topic
Topic: A Music Game II for 2009
Replies: 2765
Views: 277823

Re: A Music Game II for 2009


by katastrofa
January 20th, 2018, 9:45 pm
Forum: Off Topic
Topic: All about Cats
Replies: 468
Views: 18188

Re: All about Cats

I'll start gathering my cats' fur after grooming. They love grooming. I have to do this every day as a compensation for teeth cleaning, which they hate. The girl hates it so much that I have to pack her in a special sack not to get scratched. Her cries sometimes make me cry :-(
by katastrofa
January 20th, 2018, 9:39 pm
Forum: Off Topic
Topic: Machine learning for fun, to pay your rent or whatever
Replies: 156
Views: 3402

Re: Machine learning for fun, to pay your rent or whatever

Yes,  like I said KL doesn't satisfy requirement #2 d(x,y)=d(y,x). It's a measure founded in information theory. There are tons of similarity measure that are non-metric. Nor #3 (triangle inequality). `Yes! e.g. cosine similarity, https://en.wikipedia.org/wiki/Cosine_similarity I don't want to soun...
by katastrofa
January 20th, 2018, 9:29 pm
Forum: Off Topic
Topic: Machine learning for fun, to pay your rent or whatever
Replies: 156
Views: 3402

Re: Machine learning for fun, to pay your rent or whatever

application-specific similarity measure Is that the same as metric ?  The Kullback-Leibler divergence is a statistical measure of distance. Many statistical distance measures are called divergencies in contrast to metrics, because they don't satisfy the metric's definition, e.g. KL divergence is or...
by katastrofa
January 20th, 2018, 9:16 pm
Forum: Off Topic
Topic: Machine learning for fun, to pay your rent or whatever
Replies: 156
Views: 3402

Re: Machine learning for fun, to pay your rent or whatever

outrun wrote:
Yes,  like I said KL doesn't satisfy requirement #2 d(x,y)=d(y,x). It's a measure founded in information theory.

There are tons of similarity measure that are non-metric.

Nor #3 (triangle inequality).
by katastrofa
January 17th, 2018, 6:21 pm
Forum: Off Topic
Topic: All about Cats
Replies: 468
Views: 18188

Re: All about Cats

outrun wrote:
No.
I know you had 2 already  and this 3rd one was only a drawing?

This is he, Genie and Meow-gene's son.
by katastrofa
January 17th, 2018, 5:12 pm
Forum: Off Topic
Topic: All about Cats
Replies: 468
Views: 18188

Re: All about Cats

What are you implying? That my cryptokitties aren't real?