* <SQLite> with `rowid`: https://stackoverflow.com/questions/8190541/deleting-duplicate-rows-from-sqlite-database
  * <PostgreSQL> is `ctid`: https://stackoverflow.com/questions/14626481/rowid-equivalent-in-postgres-9-2
* <SQL Server> has crazy "CTEs" change backing table extension: https://stackoverflow.com/questions/18390574/how-to-delete-duplicate-rows-in-sql-server


Delete all duplicate rows in SQL

Domain name

{title2=1923}
{wiki}

= de Broglie hypothesis
{c}
{synonym}
{title2}


Matter wave

Merck Group

{wiki}

This equation is a subcase of <equation Schrödinger equation for a one dimensional particle> with $V(x) = x^2$.

We get the <time-independent Schrödinger equation> by substituting this $V$ into <equation time-independent Schrödinger equation for a one dimensional particle>:
$$
\left[- \frac{\hbar}{2m} \pdv{^2}{x} + x^2 \right]\psi = E \psi(x)
$$

Now, there are two ways to go about this.

The first is the stupid "here's a guess" + "hey this family of solutions forms a <complete basis>"! This is exactly how we solved the problem at <solving partial differential equations with the Fourier series>{full}, except that now the complete basis are the <Hermite functions>.

The second is the much celebrated <ladder operator> method.


Quantum harmonic oscillator

Saddle point

{wiki}

\Image[https://upload.wikimedia.org/wikipedia/commons/thumb/d/da/Chenrezig_Sand_Mandala.jpg/1024px-Chenrezig_Sand_Mandala.jpg]


Sand mandala

Game AI research

List of companies by country

Mudfish

{title2=10 mm - 1 m}
{title2=300 MHz - 3 GHz}
{wiki}

= UHF
{c}
{synonym}
{title2}


Ultra High Frequency

Computer physical principle of operation

Crystal

Entrepreneur

Envelope

Envelope (music)

Mine

{c}
{title2=1980-2015}
{wiki}

= 一孩政策
{synonym}
{title2}


One Child Policy

Population inversion

Pulsed laser

{wiki}

It is very similar to the <Chinese> <suona>.

\Image[https://upload.wikimedia.org/wikipedia/commons/thumb/0/0d/Shehnai.jpg/292px-Shehnai.jpg]

\Video[https://www.youtube.com/watch?v=MkWId7Fmnik]
{title=Divine Shehnai by Saregama Hindustani Classical (2023)}


Ciro Santilli @cirosantilli 37