If any of you ever read this, do send me an email to Ciro Santilli saying hi and we can agree on a clear separation of usernames.

Although if you are just starting out, maybe you should just go from scratch with a unique Internet alias.

A younger unrelated Argentinian homonym who likes soccer that can be found through Google:Ciro used to like playing soccer too! :-)

www.ancestry.com.au/genealogy/records/ciro-santilli-24-bkmssg documents a "Ciro Santilli" born 31 Jan 1887 at Castelvécchio in Subéquo, L'Aquila, in the Abruzzo region, just like Ciro Santilli's ancestors. Parents Francesco Santilli and Anna Silveri. The page also mentions:

Unknown:

Donald Melrose is a British physicist known for his work in the field of theoretical physics, particularly in the areas of plasma physics and magnetohydrodynamics. He has made significant contributions to our understanding of waves and instabilities in plasmas, as well as their applications to astrophysical and space phenomena. Melrose has authored numerous papers and has been involved in various research initiatives related to this field.

Denis Evans could refer to different individuals or contexts, depending on what you are looking for. Here are a couple of possibilities: 1. **Denis Evans (Theoretical Physicist)**: An academic with contributions to the field of physics, particularly in statistical mechanics or thermodynamics. However, specific details about his contributions and background would depend on the individual being referred to.

Sample usage by Andy Matuschak (possible coiner): notes.andymatuschak.org/About_these_notes

Europe has made good regulations to limit the absolute power of immoral companies. Partly because it does not have any companies anymore, but so be it.

But the law that forces every fucking website to show a message "Do you consent to cookies?" is not one of them.

Ciro cannot stand fucking clicking the "I consent" button anymore.

Please stop, for the love of God.

At most, there must be a standardized API that allows your browser to say "I agree or I disagree" automatically to all of them, e.g. an HTTP header.

2021: United Kingdom is considering it post-Brexit: techcrunch.com/2021/09/06/after-years-of-inaction-against-adtech-uks-ico-calls-for-browser-level-controls-to-fix-cookie-fatigue/. Something good might actually come out of Brexit!

ISWIM (short for "I'm Still What I Mapped") is a programming language that was developed in the early 1970s as an experimental language for teaching and research in the field of computer science, particularly in the area of programming language design and implementation. ISWIM is notable for its influence on subsequent programming languages and its contributions to the study of functional programming. The language was introduced by Peter G. Neumark and later developed with contributions from others including Robin Milner.

David McClelland is an Australian physicist known for his contributions to the field of gravitational wave detection and astrophysics. He has been significantly involved in projects related to laser interferometry and the detection of gravitational waves, particularly through his work with large-scale observatories such as the Laser Interferometer Gravitational-Wave Observatory (LIGO) and other related experiments.

Euphemisms are evil bullshit.

Just say what you mean to say,

Don't be a pussy.

If you've been fired, say you been fired, not "let go".

If someone died, say they died, not "passed away".

Colin J. Gillespie is a statistician known for his work in various areas of statistics, including Bayesian methods and statistical modeling. He is particularly recognized for his contributions to statistical methodology and applications in fields like genetics and ecology. In addition to his research, he has been involved in teaching and mentoring in the field of statistics.

As of my last update in October 2023, there isn't widely recognized information about a person named Christopher Chantler in mainstream media or notable databases. It's possible that he could be a private individual, a professional in a specific field, or someone who has gained prominence after my last update.

Chennupati Jagadish is a prominent Indian physicist known for his significant contributions to the field of semiconductor physics and nanotechnology. He has served as a professor at the Australian National University (ANU) and is recognized for his research on the optical and electrical properties of semiconductors, particularly in relation to quantum dots and photonic devices. Jagadish has been involved in various scientific and academic initiatives and has contributed to the development of advanced materials and technologies.

Let's start with the one dimensional case. Let the $q:\mathbb{R}\to \mathbb{R}$ and a Functional $I$ defined by a function of three variables $F:{\mathbb{R}}^3\to \mathbb{R}$:

Then, the Euler-Lagrange equation gives the maxima and minima of the that type of functional. Note that this type of functional is just one very specific type of functional amongst all possible functionals that one might come up with. However, it turns out to be enough to do most of physics, so we are happy with with it.

Given $F$, the Euler-Lagrange equations are a system of ordinary differential equations constructed from that $F$ such that the solutions to that system are the maxima/minima.

In the one dimensional case, the system has a single ordinary differential equation:

By $\frac{\partial F}{\partial q}$ and $\frac{\partial F}{\partial \dot{q}}$ we simply mean "the partial derivative of $F$ with respect to its second and third arguments". The notation is a bit confusing at first, but that's all it means.

Therefore, that expression ends up being at most a second order ordinary differential equation where $q$ is the unknown, since:

Now let's think about the multi-dimensional case. Instead of having $q:\mathbb{R}\to \mathbb{R}$, we now have $q:\mathbb{R}\to {\mathbb{R}}^n$. Think about the Lagrangian mechanics motivation of a double pendulum where for a given time we have two angles.

Let's do the 2-dimensional case then. In that case, $F$ is going to be a function of 5 variables $F:{\mathbb{R}}^5\to \mathbb{R}$ rather than 3 as in the one dimensional case, and the functional looks like:

This time, the Euler-Lagrange equations are going to be a system of two ordinary differential equations on two unknown functions $q_1$ and $q_2$ of order up to 2 in both variables:At this point, notation is getting a bit clunky, so people will often condense the $q_i$ vectoror just omit the arguments of $F$ entirely:

Cecil Ernest Eddy, often known as "C.E. Eddy," was an American chemist who is particularly notable for his contributions to the field of geochemistry, which involves the study of the chemical composition of the Earth and its processes. He has authored and co-authored various scientific papers and works, focusing on topics such as mineral chemistry and the formation of geological materials.

Betty Louise Turtle is a unique and charming character often associated with children's literature, specifically created for educational purposes. She typically embodies traits such as kindness, curiosity, and a love for learning. Often found in stories aimed at teaching values such as friendship, perseverance, and problem-solving, Betty Louise Turtle may also serve as a symbol of slow and steady progress, promoting the idea that taking time can lead to success.

${\mathbb{R}}^n$ with extra structure added to make it into a metric space.