The nonlinear Riccati differential equation, since its enunciation by Jacopo Riccati in 1724, has become a legendary equation. Despite a 300-year search for a solution, it has not been possible to ...

Canonical URLs help prevent duplicate content in search. Learn what they are, why they matter, and how to set them up correctly to protect rankings. Canonical URLs are HTML elements that tell search ...

The first time I saw the “Duplicate without user-selected canonical” error in Google Search Console, I gulped. “Oh, no. Please, not this.” Then I saw it again ...

Instituto Nacional de Investigaciones Nucleares, Centro Nuclear de México, Departamento de Física, City La Marquesa Ocoyoacac, Estado de México, Mexico. Nonlinear differential equations are often ...

The Nature Index 2025 Research Leaders — previously known as Annual Tables — reveal the leading institutions and countries/territories in the natural and health sciences, according to their output in ...

We consider a model for Darwinian evolution in an asexual population with a large but nonconstant populations size characterized by a natural birth rate, a logistic death rate modeling competition and ...

We give an explanation of the d log-form of the coefficient matrix of canonical differential equations using the projection of (n+1)-d log forms onto n-d log forms. This projection is done using the ...

All the tech we rely on, from cars to smartphones, was engineered using physics. You don’t need to know the science to use these things. But a well-rounded human should understand at least some of the ...

Google’s John Mueller answered a question on LinkedIn about how Google chooses canonicals, offering advice about what SEOs and publishers can do to encourage Google how to pick the right URL. In the ...

Abstract: Hamilton's canonical equations play important roles in the analysis and control of nonlinear systems. How ever, it is difficult to obtain their analytic solutions because they are nonlinear ...

It is shown that the calculation of Dirac operator for the spherical coordinate system with spherical Dirac matrices and using the spin connection formalism is in the contradiction with the definition ...