Hilbert's problems refer to a set of 23 mathematical problems presented by the German mathematician David Hilbert in 1900 at the International Congress of Mathematicians in Paris. These problems were intended to define the challenges and goals for mathematical research in the 20th century and have had a profound influence on mathematics. Each of the problems addresses different areas of mathematics and ranges from pure to applied mathematics.

"Discoveries" by John E. Rogers is a book that focuses on various scientific, technological, and historical discoveries that have shaped our understanding of the world.

As of my last knowledge update in October 2021, Alejandro Vallega is not widely recognized in popular culture, politics, or academia. It's possible that he may be a figure that has emerged recently or is relevant in a specific context that was not covered before that date.

Drucilla Cornell is a prominent legal scholar and professor known for her work in the fields of law, philosophy, and feminism. She has made significant contributions to critical legal studies, feminist theory, and social justice. Cornell's work often explores the intersections of law, ethics, and identity, engaging with themes such as democracy, rights, and the political implications of legal frameworks. In addition to her academic publications, she has been involved in various scholarly and activist initiatives aimed at promoting social change.

Jean-François Lyotard (1924–1998) was a French philosopher, sociologist, and literary theorist, best known for his work on postmodernism and the critique of modernity. His most influential work is "The Postmodern Condition: A Report on Knowledge" (1979), in which he discusses the nature of knowledge in postmodern societies.

Werner Hamacher is a prominent German philosopher and scholar known for his contributions to literary theory, philosophy, and deconstruction. He has engaged extensively with the works of notable figures like Martin Heidegger, Friedrich Nietzsche, and Jacques Derrida. Hamacher's work often explores themes such as language, interpretation, and the relationship between literature and philosophy. He is known for his interdisciplinary approach, connecting various fields of study, including philosophy, philology, and critical theory.

The term "differentia" can have various meanings depending on the context in which it's used. Here are a few possibilities: 1. **Philosophy**: In philosophical contexts, especially in discussions of metaphysics and epistemology, "differentia" refers to the distinguishing characteristics or attributes that set one thing apart from another. It's often used in discussions about definitions and classifications.

In philosophy, the term "genus" refers to a category or class that groups together entities sharing common characteristics. It is a foundational concept in various philosophical contexts, notably Aristotle's work. In his classification system, Aristotle used "genus" to describe broader categories that encompass multiple specific instances or "species." For example, in the genus-species distinction, "animal" can be considered a genus, while "dog" and "cat" would be considered species within that genus.

Critical resolved shear stress (CRSS) is a fundamental concept in materials science and engineering, particularly in the study of plastic deformation in crystalline materials. It refers to the minimum shear stress required to initiate and propagate slip, which is the process of deformation in which a material can change shape without an accompanying change in volume. In crystalline materials, the atomic structure is organized in a highly ordered lattice.

In engineering, deformation refers to the change in shape or size of an object due to an applied force or load. This concept is crucial in various fields, including structural, mechanical, and civil engineering, as it helps engineers understand how materials behave under different conditions. There are two primary types of deformation: 1. **Elastic Deformation**: This occurs when the applied load is within the material's elastic limit.

Several computer companies in China have become defunct over the years, often due to market competition, strategic missteps, or the fast-paced nature of the technology industry. Here are a few notable examples: 1. **Legend Group (Lenovo's predecessor)** - While Lenovo as a brand still exists, the original Legend Group that was founded in 1984 diversified away from personal computers and shifted focus, leading to its transformation rather than outright defunct status.

Defunct networking companies are organizations that were once active in providing networking products, services, or technologies but have ceased operations. This could be due to a variety of reasons, including bankruptcy, poor management, market changes, competitive pressures, or technological obsolescence.

Europolkering, also known as the Europoort Barrier, is a storm surge barrier located at the entrance of the Europoort industrial area in Rotterdam, Netherlands. It is designed to protect the port and its surrounding areas from flooding caused by storm surges and high tides. The barrier is part of a larger system of flood defenses in the Netherlands, which is known for its low-lying geography and vulnerability to flooding.

Grevelingendam is an artificial dam in the Netherlands, specifically located in the province of Zeeland. It forms part of the Delta Works, a major series of construction projects designed to protect the Dutch coastline from flooding. The dam was built to close off the Grevelingen Lake from the North Sea, helping to manage water levels and serve as a barrier against storm surges.

Veerse Gatdam is a dam located in the Netherlands, specifically in the province of Zeeland. It is part of the larger Delta Works, a series of construction projects designed to protect the land from flooding and manage water levels in the region. The Veerse Gatdam serves as a barrier between the North Sea and the Veerse Gat, a body of water that is part of the Eastern Scheldt estuary.

Alexander von Keyserling was a notable 19th-century German naturalist and paleontologist, historically recognized for his contributions to the study of fossils and geology. He is particularly known for his work in the field of stratigraphy and his research on the geological formations in the Baltic region. In addition to his scientific endeavors, Keyserling was also involved in politics and served in various capacities within the German Empire.

Alexander Andreev can refer to multiple individuals, as it is a relatively common name. Without additional context, it's difficult to pinpoint exactly which Alexander Andreev you are referring to. 1. **Alexander Andreev (Mathematician)** - He may refer to a mathematician known for contributions in a specific field, such as mathematical analysis or probability theory.

As of my last update in October 2023, there is no widely known figure named David Chubinashvili. It's possible that he is a private individual, a lesser-known person, or someone who has gained prominence after my last update.

Dmitrii Ivanovich Zhuravskii is not widely recognized or associated with any prominent figures, events, or concepts in popular culture or history up to October 2023. It's possible that you may be referring to a less-known individual, a fictional character, or a recent development that is not part of the general knowledge base.

Friedrich Benjamin von Lütke (1797-1883) was a notable German-born explorer, navigator, and cartographer who significantly contributed to the exploration of Siberia and the Russian Far East in the 19th century. He is best known for his work in mapping and navigating the waters of the Bering Sea and his involvement in Russian naval expeditions.