A book opened to a page featuring a black and white Venn diagram. The diagram is drawn with two overlapping circles containing Portuguese text. One circle says 'O que você ama' and the other 'O que te ama de volta'. The overlapping section, highlighted with an arrow pointing to it, forms part of the sentence 'Se você for sortudo.' on the page.

His work laid the groundwork for relational databases and modern data management.

Germany

1845 – 1918

His work laid the groundwork for relational databases and modern data management.

USA

1966

Paul Halmos simplified Cantor’s ideas in “Naive Set Theory” for students and readers alike.