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what's next? http://www.calcudoku.org/forum/viewtopic.php?f=2&t=755 
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Author:  pnm [ Fri Dec 18, 2015 11:41 am ] 
Post subject:  Re: what's next? 
frederick wrote: Edit: Rereading your post re the January issue and seeing again, "and priced as low as possible" I do hope there is some decent return in this price otherwise my aspiration to top up your return would be fallacious. The royalties are as follows: $0.24 on Amazon US, 1 penny (about $0.015) UK, and 20 euro cents (about $0.22) EU. The idea was to make these books as accessible as possible (so no, in this case not a lot of "topping up", but that is intentional). Just to make sure people don't feel they have to get the books for the points, I'll drop that option starting the February issue. Patrick 
Author:  sjs34 [ Fri Dec 18, 2015 2:13 pm ] 
Post subject:  Re: what's next? 
For those who have not joined Amazon Prime, shipping costs more than the magazine. Hopefully the magazines will be available indefinitely so that they can be bundled into other orders. 
Author:  clm [ Fri Dec 18, 2015 8:36 pm ] 
Post subject:  Re: what's next? 
pnm wrote: frederick wrote: Edit: Rereading your post re the January issue and seeing again, "and priced as low as possible" I do hope there is some decent return in this price otherwise my aspiration to top up your return would be fallacious. The royalties are as follows: $0.24 on Amazon US, 1 penny (about $0.015) UK, and 20 euro cents (about $0.22) EU. The idea was to make these books as accessible as possible (so no, in this case not a lof of "topping up", but that is intentional). Just to make sure people don't feel they have to get the books for the points, I'll drop that option starting the February issue. Patrick Thank you for the new magazine, I am sure it will be a new challenge as usual, one per month is a hard responsibility (I would have rather suggested one every other month, i.e., but now it's late). I vote for the idea of awarding points for the difficult ones, in the Calcudoku site (30 per magazine seems OK, one per day, but in this case I would clearly stablish a totally different daily limit for these puzzles, so that the puzzles of the nonperiodic books can be sent at the same time, and in order to recover the puzzles of the old magazines). With respect to the price of the books, ..., perhaps you shoud think of the idea of prepearing new editions, see what is happennig for instance in amazon.es with the "101 Advanced Puzzles" first edition, http://www.amazon.es/CalcudokuAdvanced ... atrick+min , the books brand new around 66 euros and the used books around 56 . 
Author:  pnm [ Fri Dec 18, 2015 10:08 pm ] 
Post subject:  Re: what's next? 
clm wrote: see what is happennig for instance in amazon.es with the "101 Advanced Puzzles" first edition, http://www.amazon.es/CalcudokuAdvanced ... atrick+min , the books brand new around 66 euros and the used books around 56 . Not sure why that link is showing those prices, this one: http://www.amazon.es/CalcuDoku101Adva ... 144614349X shows the regular price. (and that's also the link from the "Books" page) Edit 1: yes, I'll probably increase the daily book puzzle limit from 1 to 2. Edit 2: I sent an inquiry to Amazon about these two pages with different prices. Edit 3: Amazon confirmed that this was an error, and merged the two pages. Apparently "Sometimes, when a book is listed by Marketplace sellers, it receives its own Detail page instead of being correctly listed under the original Amazon sales page.". I suppose it is in their (the other sellers') interest to make the book look rare 
Author:  beaker [ Fri Dec 18, 2015 10:38 pm ] 
Post subject:  Re: what's next? 
Would prefer book puzzles with points and not just for the most difficult ones ! 
Author:  Christopher PA [ Sun Dec 27, 2015 4:24 am ] 
Post subject:  Re: what's next? 
This may be a minor digression, but I've quite liked the puzzles with exponential and modulo operators. Perhaps we could extend this to puzzles with floor, ceiling or log operators as possible variants. 
Author:  pnm [ Mon Dec 28, 2015 12:54 am ] 
Post subject:  Re: what's next? 
gp_20017 wrote: Perhaps we could extend this to puzzles with floor, ceiling or log operators as possible variants. Interesting ideas, thanks So division with floor/ceiling (assuming that's what you mean). For log there are limited options it looks like, e.g. clue is "4 log" in a 16x16 puzzle, answer must be 2 and 16, because log (base 2) of 16 = 4 ? Patrick 
Author:  beaker [ Mon Dec 28, 2015 12:59 am ] 
Post subject:  Re: what's next? 
OMG!!!.....Pardon my ignorance, but what does a floor or a ceiling have to do with Math and I always thought a log was something you burned in a fireplace 
Author:  Christopher PA [ Mon Dec 28, 2015 2:59 am ] 
Post subject:  Re: what's next? 
Quote: Interesting ideas, thanks So division with floor/ceiling (assuming that's what you mean). For log there are limited options it looks like, e.g. clue is "4 log" in a 16x16 puzzle, answer must be 2 and 16, because log (base 2) of 16 = 4 ? Patrick Yes, that's what I had in mind, i.e. floor(9/5=1.8) = 1 and ceiling(9/5=1.8) = 2. With ceilings/floors, there are definitely a lot of combinations. While logs are a bit of a stretch, I though they might add an extra dimension to other puzzles. I think it would work, if, for example, the clue was "0 log", then you would know that it contained a 1. Or in let's say a 9x9 puzzle with clues like "2 log", there would be two combinations  (2,4) and (3, 9)  for a twocelled region. You could possibly have a threecelled region with "1 log" and combinations like (2,3,8) and (2,2,4) (log_3(log_2(8)) = 1; log_2(log_2(4))=1) in the same spirit as you've done exponentials where we read from right to left. I do agree that logs would work best in larger puzzles  but I think a few creative things can be done. 
Author:  Christopher PA [ Mon Dec 28, 2015 3:07 am ] 
Post subject:  Re: what's next? 
Quote: OMG!!!.....Pardon my ignorance, but what does a floor or a ceiling have to do with Math and I always thought a log was something you burned in a fireplace The floor function takes a number, x, and rounds it down to the largest integer less than or equal to x; the ceiling function takes a number, x, and rounds it up to the largest integer greater than or equal to x. The logarithm is quite natural if you're familiar with exponentials  it is the inverse operation, i.e. exp(log(x)) = log(exp(x)) = x (if realvalued, x>0). But, like taking an exponential, it depends on the base. You might by abuse of notation (this is not used!) say exp_2(5) = 2^5 = 32, whence log_2(32) = 5. 
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