Title
Isomorphism Testing for Restricted Graph Classes: On the complexity of isomorphism testing and reachability problems for restric,Used
Delivery time: 8-12 business days (International)
The graph isomorphism problem (GI) consists of deciding whether there is a bijection between the vertices of two graphs, which preserves the adjacency relations. GI is not known to be NPcomplete nor to be in P. The enormous gap between the known upper and lower bound has motivated a study of isomorphism restricted to special classes of graphs where this gap can be reduced. We prove for the classes of planar graphs, K_{3,3}minor free and K_5minor free graphs, that isomorphism testing is in logspace. For graphs of bounded treewidth we prove a new upper bound LogCFL. We also consider the complexity of the isomorphism problem when groups or quasigroups are given in table representation. Because of all these results in the context of logarithmic space complexity classes we also consider reachability problems. Reachability is a widely studied problem especially in the space setting, it asks in a directed graph with two designated vertices s and t whether there is a path from s to t. We improve some upper bounds of the reachability problems for the mentioned graph classes.
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Shipping & Returns
Shipping
We ship your order within 2–3 business days for USA deliveries and 5–8 business days for international shipments. Once your package has been dispatched from our warehouse, you'll receive an email confirmation with a tracking number, allowing you to track the status of your delivery.
Returns
To facilitate a smooth return process, a Return Authorization (RA) Number is required for all returns. Returns without a valid RA number will be declined and may incur additional fees. You can request an RA number within 15 days of the original delivery date. For more details, please refer to our Return & Refund Policy page.
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Warranty
We provide a 2-year limited warranty, from the date of purchase for all our products.
If you believe you have received a defective product, or are experiencing any problems with your product, please contact us.
This warranty strictly does not cover damages that arose from negligence, misuse, wear and tear, or not in accordance with product instructions (dropping the product, etc.).
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Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
We accept payments with :
Visa, MasterCard, American Express, Paypal, Shopify Payments, Shop Pay and more.