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Description
Combinatorics: A Very Short IntroductionHow many possible sudoku puzzles are there? In the lottery, what is the chance that two winning balls have consecutive numbers? Who invented Pascal's triangle? (it was not Pascal) Combinatorics, the branch of mathematics concerned with selecting, arranging, and listing or counting collections of objects, works to answer all these questions. Dating back some 3000 years, and initially consisting mainly of the study of permutations and combinations, its
How many possible sudoku puzzles are there? In the lottery, what is the chance that two winning balls have consecutive numbers? Who invented Pascal's triangle? (it was not Pascal) Combinatorics, the branch of mathematics concerned with selecting, arranging, and listing or counting collections of objects, works to answer all these questions. Dating back some 3000 years, and initially consisting mainly of the study of permutations and combinations, its scope has broadened to include topics such as graph theory, partitions of numbers, block designs, design of codes, and latin squares. In this Very Short Introduction Robin Wilson gives an overview of the field and its applications in mathematics and computer theory, considering problems from the shortest routes covering certain stops to the minimum number of colours needed to colour a map with different colours for neighbouring countries.ABOUT THE SERIES: The Very Short Introductions series from Oxford University Press contains hundreds of titles in almost every subject area. These pocket-sized books are the perfect way to get ahead in a new subject quickly. Our expert authors combine facts, analysis, perspective, new ideas, and enthusiasm to make interesting and challenging topics highly readable.
Binding Type: Paperback
Publisher: Oxford University Press, USA
Published: 07/01/2016
ISBN: 9780198723493
Pages: 144
Weight: 0.30lbs
Size: 6.80h x 4.20w x 0.50d
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4.3 ★★★★★
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Product Reviews
★★★★★ 5
Exactly what I was looking for!
Color: Charcoal Grey, Size: 6-Tier(10.7 x 14.5 x 65.3 Inches), Color: Charcoal Grey, Size: 6-Tier(10.7 x 14.5 x 65.3 Inches)
This shelf is the perfect size! Fits in a small space. Was so easy and quick to put together. Is very good quality, nice and sturdy. No parts were missing and everything came in perfect condition. I love it! I bought the Charcoal Gray.
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Reviewed in the United States on March 29, 2026
★★★★★ 5
amazing, cost-effective solution
Color: Brown, Size: 6-Tier(10.7 x 14.5 x 65.3 Inches), Color: Brown, Size: 6-Tier(10.7 x 14.5 x 65.3 Inches)
needed a narrow set of shelves for an awkward space in our new nursery, couldn’t believe the price! Looks sharp despite being particle board, quick assembly, and holds the amazon basics square bins 6-pack PERFECTLY!!
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Reviewed in the United States on February 14, 2026
★★★★★ 5
great value!!
Color: White, Size: 6-Tier(10.7 x 14.5 x 65.3 Inches), Color: White, Size: 6-Tier(10.7 x 14.5 x 65.3 Inches)
Totally worth buying! The assembly is tinkertoy easy and they look nice! I bought four of the six tiers for my small home art studio.. one for books and three for all else. I didn't want big heavy shelves and these are light and stable!
I put them with a couple other storage pieces I already had, painted a piece of 1x12 lumber white, to put across the top of them to make one long shelf and installed a couple of battery operated puck lights in them, and voila; a large, stable unit without the intimidating weight or price. If my little art studio were bigger I would buy more of them!
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Reviewed in the United States on November 5, 2025
★★★★★ 4
Looks great, gets the job done, definitely not high-end
Color: White, Size: 6-Tier(10.7 x 14.5 x 65.3 Inches)
I purchased not one, but *two* of these shelves for the purposes of storing my massive hoard of plush toys. For what I purchased them for, they get the job done swimmingly and they look great with the rest of my room.
Assembly was simple, and although it was fairly easy to figure out, the provided instruction manual may not be easy for some to make sense of. There are also provided pieces for mounting the shelves to the wall for added sturdiness, and though they are included in the parts list, there are no provided instructions for them.
One thing buyers should be aware of is the shelves and legs may arrive dirty with the dust and dirt from the factory. It's relatively easy to wipe them off with your hand, but it may not be a good first impression.
As other buyers mentioned, a few of the pieces came with visual imperfections that, while easy to hide, may turn away those who are more particular about aesthetics. For the price however, the shelves are still well-made.
Other buyers have mentioned concerns about the sturdiness and stability of the shelves. I cannot comment on the sturdiness as plush toys are not particularly heavy, however the shelves do exhibit a wobble (which is to be expected for this particular make of shelf; one without structural support in between the beams). That being said, though it wobbles, it doesn't feel as if it will fall apart easily. The pieces are all solid wood, as well.
One negative is when I was putting on one of the feet for the second shelf, I'd twisted it tight (as I did with no issue for the other pieces), but for this particular piece it caused the glued in screw component to pop out. I had to use pliers to remove it from the shelf so I could use one of the spare legs instead. I did not face this issue with any other pieces, but it should be kept in mind that the application of glue across the pieces does not appear to be consistent.
All in all, it is a good shelf and I am satisfied with my purchase. I did not expect a pristine or elegant shelf (nor did I intend to buy one), as this is a very fairly priced shelf. I got what I paid for.
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Reviewed in the United States on February 20, 2024
★★★★★ 5
This product fits my needs.
Color: Black, Size: 6-Tier(10.7 x 14.5 x 65.3 Inches)
I needed a narrow shelf that was tall so I could place the security system tower on the top shelf for a better connection. It was easy to assemble, came in various colors and the packaging was compact enough to handle. It also came with additional parts so you can change the layout from a tall shelf to smaller end tables. Great for small items, books and very versatile. I will be purchasing this product again!
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Reviewed in the United States on April 4, 2026