Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 14 - Jul 19
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
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
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 2283 reviews
Sort
Product Reviews
★★★★★ 5
Fabulous Product!
Color: 7-in-1 Black, Size: Rechargeable Set
This wine opener is fabulous! Foil cutter is sharp and works well. Easily removes the cork, then releases the cork from the corkscrew with a touch of a button. Also seals the wine which I have stored on its side in my wine refrigerator without any leaks. Charges quickly and I have opened many bottles of wine without needing to recharge it. Have had this item for a few months and if it continues to work this well, I will be amazed and very satisfied. Very reasonably priced as compared with similar products that I considered. Most of the other products cost more and did not do all of the functions that the Circle Joy does.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 23, 2026
★★★★★ 5
Effortless Electric Wine Opener with Sleek Design
Color: 7-in-1 Black, Size: Rechargeable Set, Color: 7-in-1 Black, Size: Rechargeable Set
This electric wine opener works great and makes opening bottles quick and effortless. It has a sleek modern design, feels comfortable to hold, and the charging base keeps it organized and ready to use. Removes corks smoothly in seconds with very little effort. A stylish and practical addition for any wine lover.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 19, 2026
★★★★★ 4
Very easy to use to open the wine
Color: 7-in-1 Black, Size: Rechargeable Set
Instructions were not clear enough, instructions about the bottle stoppers. The opener aprons well though. That was very easy once charged.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 2, 2026
★★★★★ 5
Vendor support is excellent
Color: 7-in-1 Black, Size: Rechargeable Set
UPDATE 2: The vendor proactively reached out to me and sent me a replacement. The replacement works well so I’ve given them 5 Stars.
UPDATE: It really doesn’t ever go in straight so every cork is at risk for breaking off. I lowered rating to two. It ultimately works about 85% of the time.
Meh. Works most of the time, but has issues. It wrecks corks much more often than the Brookstone one we had before. It seems to twist in sideways so that it runs along the glass of the bottle neck instead of straight down. This causes it to destroy the corks fairly frequently… and on occasion it destroys it so much that you can’t get the cork out at all.
Pros:
Quiet
Has the bottle sealers and suction.
Recharges on base.
Cons:
Damages corks
Sometimes destroys corks to point of not being able to extract them.
Goes in crooked.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 3, 2026
★★★★★ 5
Great for any wine drinker
Color: 7-in-1 Black, Size: Rechargeable Set
This is really neat and works well. Easy to charge, but read the directions first, and great value. If you like wine, this is a great product.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 16, 2026