Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 9 - Jul 14
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Category Theory in Context"The book is extremely pleasant to read, with masterfully crafted exercises and examples that create a beautiful and unique thread of presentation leading the reader safely into the wonderfully rich, expressive, and powerful theory of categories." The Math Association Category theory has provided the foundations for many of the twentieth century's greatest advances in pure mathematics. This concise, original text for a one semester course on the
"The book is extremely pleasant to read, with masterfully crafted exercises and examples that create a beautiful and unique thread of presentation leading the reader safely into the wonderfully rich, expressive, and powerful theory of categories." -- The Math AssociationCategory theory has provided the foundations for many of the twentieth century's greatest advances in pure mathematics. This concise, original text for a one-semester course on the subject is derived from courses that author Emily Riehl taught at Harvard and Johns Hopkins Universities. The treatment introduces the essential concepts of category theory: categories, functors, natural transformations, the Yoneda lemma, limits and colimits, adjunctions, monads, and other topics.
Suitable for advanced undergraduates and graduate students in mathematics, the text provides tools for understanding and attacking difficult problems in algebra, number theory, algebraic geometry, and algebraic topology. Drawing upon a broad range of mathematical examples from the categorical perspective, the author illustrates how the concepts and constructions of category theory arise from and illuminate more basic mathematical ideas. Prerequisites are limited to familiarity with some basic set theory and logic.
Binding Type: Paperback
Publisher: Dover Publications
Published: 11/16/2016
ISBN: 9780486809038
Pages: 272
Weight: 0.85lbs
Size: 8.90h x 5.90w x 0.60d
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
4.2 ★★★★★
Based on 329 reviews
Sort
Product Reviews
★★★★★ 5
Value for your money
Qtips are better than other brands. Tried them all. The stick doesn't break. Good cotton. Cleaning performance grand!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 5, 2026
★★★★★ 5
The perfect toothbrush
Color: Pink
I finally found my perfect manual toothbrush. This after having used sonic are toothbrushes for many years now. This makes my teeth feels so clean afterward. The handle is a great length. It’s easy to hold and get into those spaces in the back of your mouth. The brushes are super soft and easy on the gums. The brushhead is just the right size. I feel this is a good price for a quality product. Not only that but it looks nice too!! I will be coming back for more.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 11, 2025
★★★★★ 5
Best Toothbrush I've EVER used!
Color: Mint
I'm 41 years old... & this may be the best toothbrush I've ever used in my life. The bristles are just perfect; super soft but tough enough to have your teeth feeling like you went to the dentist for a cleaning, gentle on the gums, & thin enough to clean in between your teeth. I honestly didn't want to stop & go over the 2 min just because it feels like a teeth massage. I will not be buying another toothbrush, I'm sticking with these!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 2, 2026
★★★★★ 5
a perfect manual toothbrush
Color: Mint
this is definitely my favorite toothbrush i've ever used. even though it's just a manual one, it's still my favorite. it's aesthetically pleasing and the bristles are perfectly soft so it doesn't hurt my gums (i naturally have sensitive and fragile gums). i love caps that covers bristles; it's a must if you keep your toothbrush in the bathroom and this toothbrush comes with a cap that clicks open instead of one that slides on and off, pretty unique and much more hygienic as it keeps the germs out much better.
i can't comment on the capabilities of the charcoal since i just received this but i can say that when i used it, i didn't feel any grit at all, so i believe boka's claim that the charcoal is soft enough to be safe for teeth (most of the time, charcoal is too gritty for teeth and ruins the enamel) the toothbrush is also pretty hefty so it's not cheap! paired with the boka toothpaste, my teeth feel so clean. now off to buy the whitening strips, floss, and mouthwash tablets from my new favorite brand!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2024
★★★★★ 5
Excellent
Color: Multi Color
I really like this product , it is plush means more fibers , it is not harsh plastic to blister your gums , for what it is very good price and quality.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 3, 2026
recommand products
925 Sterling Silver & Genuine Cognac Baltic Amber Ring - Adjustable - RG0913
100.00
925 Sterling Silver & Genuine Cognac Baltic Amber Ring - Adjustable - RG0897
112.00
Genuine Baltic Amber Elastic Beaded Bracelet for Men - MB027
19.95
925 Sterling Silver & Genuine Lemon Baltic Amber Ring - Adjustable - RG0928
80.40
925 Sterling Silver & Genuine Lemon Baltic Amber Ring - Adjustable - RG0884
101.00