meta user
network profile
| bio | website | giacomodrago.com |
|---|---|---|
| location | Rome, Italy | |
| age | 25 | |
| visits | member for | 1 year, 10 months |
| seen | Apr 21 at 7:58 | |
| stats | profile views | 26 |
My main occupation has always been the one of developing web applications in Java and PHP (I started when I was 16), but I do not feel like I'm going to do this forever. I'm not tied to any particular technology, and always open to learn something new.
I develop open source projects in Java, C and C++ to cultivate my personal interests.
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Apr 3 |
comment |
Function mapping combinations to natural numbers Thank you. Thanks to your suggestions I've managed to write a small Java library to deal with combinations. |
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Apr 3 |
awarded | Commentator |
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Apr 3 |
revised |
Function mapping combinations to natural numbers deleted 1 characters in body |
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Apr 3 |
accepted | Function mapping combinations to natural numbers |
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Apr 3 |
comment |
Function mapping combinations to natural numbers Thank you! This is exactly what I am looking for and I'm surprised how wrong where my search queries. I'll read the whole Wikipedia article and figure out how to invert $f$. Thanks again. |
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Apr 3 |
comment |
Function mapping combinations to natural numbers OK, your edit seems more clean and concise but it lacks the fact that $C$ should be the set of all and only combinations of $n$ elements in $A$. It is not just some random set of sets. |
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Apr 3 |
comment |
Function mapping combinations to natural numbers Absolutely not. The example I provided, thanks to your correction, is now the exact thing I'm looking for. Mapping combinations to natural numbers, respecting a total order (I don't care which one) with no "holes" (condition 3). |
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Apr 3 |
revised |
Function mapping combinations to natural numbers added 12 characters in body |
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Apr 3 |
comment |
Function mapping combinations to natural numbers Sorry, my fault (poor formalism). Set of sets. I'll fix the example. |
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Apr 3 |
comment |
Function mapping combinations to natural numbers I don't mean permutations and I don't limit it to couples. I just mean combinations of $n$ elements of some set. |
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Apr 3 |
asked | Function mapping combinations to natural numbers |
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Jan 15 |
awarded | Critic |
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Jan 15 |
comment |
Does anyone know the name of the following problem? I don't understand "as many cities as possible": you can always visit N cities, if there's no constraint on the total distance covered by all salesmen (or by a single salesman). |
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Jan 3 |
awarded | Autobiographer |
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Dec 29 |
revised |
Question about a program generating palindromic prime numbers added 28 characters in body |
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Dec 15 |
revised |
Question about a program generating palindromic prime numbers added 2 characters in body |
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Dec 15 |
revised |
Question about a program generating palindromic prime numbers deleted 24 characters in body |
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Dec 15 |
revised |
Question about a program generating palindromic prime numbers added 233 characters in body |
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Dec 3 |
awarded | Nice Question |
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Dec 3 |
awarded | Yearling |
