The concept of diversity jurisdiction includes controversies between:

The concept of diversity jurisdiction in the legal context involves controversies between parties who are citizens of different states or between a U.S. citizen and a foreign country. This jurisdiction allows a federal court to hear a case when there is diversity of citizenship between the parties involved.

To determine if diversity jurisdiction applies to a particular case, you need to consider the following factors:

1. Citizenship: Determine the citizenship of each party involved. This typically includes both individuals and entities such as corporations or partnerships.

2. State Citizenship: Determine if the parties are citizens of different states. For example, if one party is a citizen of New York and the other party is a citizen of California, this condition for diversity jurisdiction would be met.

3. Amount in Controversy: In addition to diversity of citizenship, there must be a certain minimum amount in controversy for a federal court to have jurisdiction. The exact threshold can vary depending on the nature of the case, but it is typically a specified monetary amount.

If all these requirements are met, the case can be brought before a federal court under diversity jurisdiction.