One branch of the Immortelle is seen at the top left corner of this photograph, showcasing beautiful brilliant vermillion clusters of flowers. The tree flowers mainly when it is out of leaf. Behind the Immortelle are several ...

Graph pebbling is a network model for transporting discrete resources that are consumed in transit. Deciding whether a given configuration on a particular graph can reach a specified target is NP-complete, even for diameter ...

We propose the following conjecture: For every fixed alpha is an element of [0, 1/3), each graph of minimum degree at least (1 + alpha)k/2 and maximum degree at least 2(1 - alpha)k contains each tree with k edges as a ...

A Samaan tree located in a public park in Trinidad. This postcard is addressed to N.K. O'Brien of Massachuetts,United States and affixed to the postcard is a 3 cents Trinidad and Tobago postage stamp.

A Samaan Tree located in a public park in Trinidad. This postcard is addressed to N.K. O'Brien of Massachuetts,United States and affixed to the postcard is a 3 cents Trinidad and Tobago postage stamp.

The representation of binary relations has been intensively studied and many different theoretical and practical representations have been proposed to answer the usual queries in multiple domains. However, ternary relations ...