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Description
Introduction to Graph TheoryA stimulating excursion into pure mathematics aimed at "the mathematically traumatized," but great fun for mathematical hobbyists and serious mathematicians as well. Requiring only high school algebra as mathematical background, the book leads the reader from simple graphs through planar graphs, Euler's formula, Platonic graphs, coloring, the genus of a graph, Euler walks, Hamilton walks, and a discussion of The Seven Bridges of Konigsberg. Exercises
A stimulating excursion into pure mathematics aimed at "the mathematically traumatized," but great fun for mathematical hobbyists and serious mathematicians as well. Requiring only high school algebra as mathematical background, the book leads the reader from simple graphs through planar graphs, Euler's formula, Platonic graphs, coloring, the genus of a graph, Euler walks, Hamilton walks, and a discussion of The Seven Bridges of Konigsberg. Exercises are included at the end of each chapter. "The topics are so well motivated, the exposition so lucid and delightful, that the book's appeal should be virtually universal . . . Every library should have several copies" -- Choice. 1976 edition.Binding Type: Paperback
Publisher: Dover Publications
Published: 02/09/1994
ISBN: 9780486678702
Pages: 224
Weight: 0.51lbs
Size: 8.45h x 5.38w x 0.45d
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★★★★★ 5
Good hand soap for the price
Scent: Lemon
Great value for the price. The lemon scent smells fresh and clean without being overpowering, and the foaming soap works really well. I like that it’s alcohol-free and made with plant-based cleansers, so it feels gentle on the hands and doesn’t dry them out. The 2-pack refill size lasts a long time, which makes it even more worth it. Overall, a good buy for everyday use.
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Reviewed in the United States on March 22, 2026
★★★★★ 5
The best foaming soap. Doesn't dry out my hands
Scent: Lemon
I wash my hands many times a day and found that every other foaming soap I used was drying out my hands pretty bad. I found this at Target one day and gave it a try. No more dry hands!
I bought a couple Oxo foaming soap dispensers and have been using this soap for a couple years now. The lather is thick and the soap cleans my hands well without drying them out...which was a major problem with every brand I tried previously. It also smells good, but not strong (I usually buy fragrance-free products, but this doesn't bother me at all).
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Reviewed in the United States on April 27, 2026
★★★★★ 5
Rinses beautifully without drying or residue.
Scent: Rosewater (2 Pack)
The people who post videos of the refill soap being "pure water" apparently don't realize the soap also needs the FOAMING soap dispenser in order to turn this soap into foaming soap. God Bless America!
Yes, these items almost always leak when shipped, but usually not enough to return the item.
The best scents are Lemon, Desert Rose, Peppermint, and Rosewater.
I have been using these lightly scented foaming soaps for almost two decades.
They clean and rinse beautifully with no residue. Perfect for my OCD.
They never dry my hands out in the winter, regardless of how many times I wash.
The refill bottles are usually an excellent value when on sale. Highly recommended!
This foaming soap specifically needs a foaming soap dispenser. It specifically says that on the back of the package. For those complaining it’s a liquid and stays liquid, perhaps you’re using just a regular pump container.
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Reviewed in the United States on April 15, 2026
★★★★★ 4
Wonderful smell and feel. Price could be cheaper
Scent: Ocean Breeze (2 Pack)
Wonderful scent. very easy those with sensitive skin and noses. Feels wonderful on my skin for long. My one and only complaint is that It's pricey.
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Reviewed in the United States on April 30, 2026
★★★★★ 5
JR Watkins refilling hand soap
Scent: Lemon
This product is a great hand soap refill solution! Non irritating and lathers nicely!
Saves waste of buying new bottles! Refill and last longer!
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Reviewed in the United States on May 30, 2026