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logical formulae. One can also consider the coloring problem on surfaces other than the plane. The problem on the sphere or cylinder is equivalent to that...

If species were fixed and distinct from one another, there would be no problem, but evolutionary processes cause species to change. This obliges taxonomists...

The Monty Hall problem is a brain teaser, in the form of a probability puzzle, based nominally on the American television game show Let's Make a Deal...

and topped the 2023 year-end chart. Wallen's fourth studio album I'm the Problem was released on May 16, 2025. It peaked atop the Billboard 200 for six...

Problem gambling, ludopathy, or ludomania is repetitive gambling behavior despite harm and negative consequences. Problem gambling may be diagnosed as...

Problem solving is the process of achieving a goal by overcoming obstacles, a frequent part of most activities. Problems in need of solutions range from...

problem in computer science If the solution to a problem is easy to check for correctness, must the problem be easy to solve? More unsolved problems in...

mathematically rigorous instructions, typically used to solve a class of specific problems or to perform a computation. Algorithms are used as specifications for...

The year 2038 problem (also known as Y2038, Y2K38, Y2K38 superbug, or the Epochalypse) is a time computing problem that leaves some computer systems unable...

The term year 2000 problem, or simply Y2K, refers to potential computer errors related to the formatting and storage of calendar data for dates in and...

recognizing the problem. Compulsive gamblers often deny they have a problem or need treatment. The most common and successful treatment plans for problem gamblers...

The problem of evil is the philosophical question of how to reconcile the existence of evil and suffering with an omnipotent, omnibenevolent, and omniscient...

the darkness during the morning due to late sunrises. Some clock-shift problems could be avoided by adjusting clocks continuously or at least more gradually—for...

computational problems according to their resource usage, and explores the relationships between these classifications. A computational problem is a task...

question of the precise nature of their literary relationship—the synoptic problem—has been a topic of debate for centuries and has been described as "the...

set must be found. They can include constrained problems and multimodal problems. An optimization problem can be represented in the following way: Given:...

In physics, specifically classical mechanics, the three-body problem is to take the initial positions and velocities (or momenta) of three point masses...

mind–body problem is a paradigmatic issue in philosophy of mind, although a number of other issues are addressed, such as the hard problem of consciousness...

In the theory of computational complexity, the travelling salesman problem (TSP) asks the following question: "Given a list of cities and the distances...

In computability theory, the halting problem is the problem of determining, from a description of an arbitrary computer program and an input, whether the...