Problems from the book Graphs on Surfaces ... White proved in the second edition of his book [Wh73, Example 3, p. 169] that g(K 3,3,3,3) is at most 5. Jungerman [Ju75] reports that the genus of this ...

This example generates several graphs of sales data that can be accessed from a single Web page. The graphs are two bar charts of summary sales data and three pie charts that break the data down by ...

The Florida Department of Education has released examples of what it calls “problematic” material that led it to ban dozens of math textbooks — including a lesson with an algebra graph ...