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Description
Pearls in Graph Theory: A Comprehensive Introduction"Innovative introductory text . . . clear exposition of unusual and more advanced topics . . . Develops material to substantial level." American Mathematical Monthly "Refreshingly different . . . an ideal training ground for the mathematical process of investigation, generalization, and conjecture leading to the discovery of proofs and counterexamples." American Mathematical Monthly " . . . An excellent textbook for an undergraduate course."
"Innovative introductory text . . . clear exposition of unusual and more advanced topics . . . Develops material to substantial level." -- American Mathematical Monthly"Refreshingly different . . . an ideal training ground for the mathematical process of investigation, generalization, and conjecture leading to the discovery of proofs and counterexamples." -- American Mathematical Monthly
" . . . An excellent textbook for an undergraduate course." -- Australian Computer Journal
A stimulating view of mathematics that appeals to students as well as teachers, this undergraduate-level text is written in an informal style that does not sacrifice depth or challenge. Based on 20 years of teaching by the leading researcher in graph theory, it offers a solid foundation on the subject. This revised and augmented edition features new exercises, simplifications, and other improvements suggested by classroom users and reviewers. Topics include basic graph theory, colorings of graphs, circuits and cycles, labeling graphs, drawings of graphs, measurements of closeness to planarity, graphs on surfaces, and applications and algorithms. 1994 edition.
Binding Type: Paperback
Publisher: Dover Publications
Published: 12/29/2003
ISBN: 9780486432328
Pages: 249
Weight: 0.62lbs
Size: 8.48h x 5.38w x 0.53d
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4.7 ★★★★★
Based on 18 reviews
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Product Reviews
★★★★★ 5
Best watch I've ever owned in my 60yrs
Color: Brown
I purchased this 36mm Expedition North Solar Field watch about one month ago, for roughly $150, and I couldn't be more impressed. When I took it out of the box the first week of January, it had no charge...because it was in a dark box in freezing temperatures. No problem, I shined light from a regular 500 lumen rechargeable flashlight on the watch face and the second hand started to move, erratically at first, but within a minute it was moving normally. I set up the flashlight 3 inches from the watch face and left it on for 3 hours, and it has been keeping perfect time ever since. I do physical labor and this watch looks just as good as it did when I got it a month ago. The low profile keeps you from banging the watch on everything you walk past, or reach for, and the black watch face contrasting with the white numbers and near white dials, makes it very easy to tell the time at night. Also, in the past I had owned quite a few expensive watches, however, my last watch was a Timex Indiglo that I put a Shell Cordovan band on, and the real leather band that comes with this watch is more comfortable than the shell cordovan. I only own 1 watch and wear my watch continuously, only taking it off when I shower, so I feel after a month I have a pretty good read on what this watch is. It is a very tough, reliable, and comfortable watch that I will be wearing for many years to come. In my opinion, the best value for a field watch on the market.
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Reviewed in the United States on February 7, 2024
★★★★★ 1
Junk.
Color: Brown/Black
Junk watch. Arrived not working. Tried to get Timex support to help,but they put the ones on Amazon. We all know how that turned out.
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Reviewed in the United States on April 16, 2026
★★★★★ 5
Understated Style
Color: Brown/Black
I prefer Timex over Casio because of their superior aesthetics. Timex watches have never failed me. This model fits smaller men's wrists around 6 inches in diameter, and the watch face is the right size. The black face with white numbers is easy to read. The metallic body looks awesome with the brown leather band. I wish they made one with a white face. The storage battery holds up very well when there is no sun. Accuracy is excellent. This is a very presentable and versatile watch for informal wear and business casual situations.
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Reviewed in the United States on July 10, 2025
★★★★★ 3
Quality and Reliability - Hit or Miss
Color: Brown
Update: I went ahead and bought this watch again. Like many other Timex watches I’ve had in the past, the first one was faulty but I decided to roll the dice again. I needed a beater solar watch for when I go hiking, camping, etc. There are several options out there—Vaer, Casio, Citizen. I liked the look of Vaer, but their solar offerings are overpriced, IMO. The Citizen watches priced similarly to this Timex are too big and don’t offer sapphire. Casio’s analog watches have the same issue. There is their Edifice watch, but I don’t like integrated bracelets. So Timex it is again. 36mm, sapphire, solar powered, 100m water resistant, a field watch, it has what I'm looking for. And this second time around, it's been good so far— it's been reliable and accurate. So, it’s the luck of the draw with these watches. It’s one of the more attractive Timex watches, too. If I hadn't had a prior bad experience with this watch, I would give it 5 stars. But due to the inconsistency in quality, I can’t rate it higher than 3 stars.
Original review:
I wanted to add a solar powered watch to my collection. So, after some research, I decided to buy this one. It had great specs—sapphire crystal, 100m water resistance, solar powered (of course), looked good in pictures. A perfect grab-and-go-anywhere watch.
It was love at first sight when I got this watch; It was seeming like a great bang-for-buck product…
That is, until I looked at it as a timekeeping device—its primary purpose.
I compared it to my other watches and noticed it was 4 seconds behind. I thought maybe I had set the time wrong, so I corrected it. A few days passed, and again it was several seconds behind. I repeated this process a few more times, same results.
So here’s the problem: this watch doesn’t keep good time.
More specifically…
This QUARTZ watch doesn’t keep good time.
Derided by watch collectors as having no soul, accuracy is a quartz watch’s most redeeming quality. It may lack soul, but you can’t say it doesn’t excel at timekeeping; it wipes the floor with mechanical watches in that department.
But this quartz watch doesn’t do that.
At least the one I got didn’t do that; your results may vary.
But this is the third Timex in a row that I’ve bought that cost over $100 that had some kind of major defect…
Three times in a row..
I can’t rationalize buying a Timex anymore.
At least not at the higher price range.
Luckily, Amazon has a good return policy.
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Reviewed in the United States on June 9, 2024
★★★★★ 5
Very versatile
Color: Brown/Black
Fantastic watch, as long as it's exposed to some light will never run out. I have expensive watches as well, but I end up coming back to this one frequently as it's dressy enough, and small enough to fit well under motorcycle gloves. Sapphire glass at this price point is really great as well.
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Reviewed in the United States on August 8, 2025