Who first defined truth as "adæquatio rei et intellectus"?

António Manuel Martins claims (@44:41 of his lecture "Fonseca on Signs") that the origin of what is now called the correspondence theory of truth, Veritas est

2024 Nov 21

linear algebra

Does anyone know how to justify or prove that the statement "ridge estimators of regression coefficients are always unbiased" is false? That was my first question,

2025 Nov 27

Possible references for semigroup approach to Markov processes

Although I''m not anything remotely close to an expert (quite the opposite really), it seems to me that the standard reference for the kind of things you''re looking for is the book Markov

2025 Apr 13

What is the difference between Fourier series and Fourier

What''s the difference between Fourier transformations and Fourier Series? Are they the same, where a transformation is just used when its applied (i.e. not used in pure mathematics)?

2024 Dec 11

What are the criteria for "bad faith" questions?

The main criteria is that it be asked in bad faith. ;-). I''m not entirely insincere: The question is rather how can we tell that, and a big part of the answer is "context"; it''s not mainly the

2024 Feb 25

Is there a logical fallacy for confusing means with ends?

In general, people don''t confuse the means with the ends. Instead, what happens is that people get so wrapped up in the means that they fail to see that the means aren''t accomplishing

2025 May 16

When 0 is multiplied with infinity, what is the result?

What I would say is that you can multiply any non-zero number by infinity and get either infinity or negative infinity as long as it isn''t used in any mathematical proof. Because multiplying by infinity is

2025 Feb 09

trigonometry

As an example, I downloaded some GPS data from my camera the other day in which I found numbers like $4215.983.$ This turned out to represent $42$ degrees and $15.983$

2026 Feb 12

What does it mean to have a determinant equal to zero?

Your answer is already solved, but I would like to add a trick. If the rank of an nxn matrix is smaller than n, the determinant will be zero.

2025 May 17

factorial

The theorem that $binom {n} {k} = frac {n!} {k! (n-k)!}$ already assumes $0!$ is defined to be $1$. Otherwise this would be restricted to $0 <k < n$. A reason that we do define $0!$ to be $1$ is so that

2024 Dec 21

Ver/Descargar Cálculo del coste de conectar la energía solar a la red eléctrica [PDF]

La versión PDF incluye el artículo completo con referencias. Adecuado para impresión y lectura sin conexión.