Un site pour les amateurs de physique mathématique
Terms of use
Preamble
Cookies management
Intellectual property
Costs associated with your visits
Use of artificial intelligence provided by the hosting service
External links to other domains and websites
Privacy policy
© Thierry PERIAT
TERMS OF USE
Terms updated on october 27, 2026
Preamble
The official language of this internet presence is French. Any potential disputes concerning it will therefore be settled in this language. In case of doubt in the interpretation of these legal notices, the French version serves as the basis for resolving misunderstandings. It is desired that these be resolved amicably first.
As a courtesy to foreign visitors, I offer a partial English and German version of my work (see below the section concerning the AI).
The domains hades-home.fr and tla-periat.fr are linked and constitute a private internet presence. It is not a commercial showcase since I offer my work there for free. Paid works of which I am the author can only be ordered from the publishers.
Cookies management
General
There are several types of cookies.
1) Cookies that are strictly necessary for the operation of the sites used by the host (here www.sitew.com) to allow access to the hosted site, in this case: hades-home.fr and tla-periat.fr.
They cannot be refused.
2) Third-party cookies linked to the use of optional features offered by the hosted site.
They can be refused.
Refusing certain optional cookies may result in the inability to view certain parts of the site; notably: some mathematical demonstrations.
Optional cookies: description and management
1) Application Programming Interface (API)
The domains "hades-home.fr" and "tla-periat.fr" offer scientific content. They sometimes make use of mathematical formulas. The simplest ones can be read without the use of a specialized program.
On the other hand, on certain pages featuring more sophisticated formulations, equations can be viewed thanks to the use of the MathJax program.
For your information
a) To view these parts, which is entirely your choice, you must accept, meaning authorize the use of this application.
b) Your acceptance in principle causes no profiling and no deposition of advertising cookies.
c) However, when you access a page containing equations viewable thanks to the MathJax application, it may be that:
(i) the content delivery network (CDN) delivering information from the site host's servers loads technical cookies for security reasons or delivery performance.
Refusing these cookies may result in an unability to read the equations.
(ii) the MathJax program may eventually place a cookie on your computer to save the configuration chosen by you (potential zoom size, rendering type, etc.).
2) Audience measurement
The site uses the fully anonymized features of the "Google Search Console". However:
You can refuse these measurements.
3) Additional information regarding the storage of cookies on your device
Generally speaking, direct management of cookies stored on your computer equipment remains possible at all times, independently of the settings explained previously, by using the settings of your internet interface (browser), for example: Google, Google Chrome, Edge, Mozilla, Opera, etc.
It is often enough to click on the symbol located in front of the internet address you are visiting.
A context menu opens and it becomes possible to click on a line labeled as follows (or equivalent in meaning): "cookies and website data". It offers more or less rapid access to information and options allowing you whether or not to eliminate the cookies stored on your device.
Intellectual Property
The author and writer of the content presented on this site is the French citizen Thierry PERIAT.
Article L122-4 of the French Intellectual Property Code states that "any full or partial representation or reproduction made without the consent of the author or his successors in title or assigns is unlawful. The same applies to translation, adaptation or transformation, arrangement or reproduction by any art or process whatsoever".
The reproduction, representation or distribution, by any means whatsoever, of a work of the mind in violation of the author's rights as defined and regulated by law constitutes the offense of copyright infringement (Article L.335-3 of the French Intellectual Property Code).
Article L122-5 of the Intellectual and Artistic French Property Code defines the uses that may be made of a work. For example, under paragraphs 1° and 2°, "copies or reproductions strictly reserved for the private use of the copier and not intended for collective use are authorized".
Costs associated with your visits
Access to the hades-home.fr and tla-periat.fr domains is of course only possible if you have an internet subscription. The costs related to this subscription are entirely your responsibility.
The user is solely responsible for accessing and using the hades-home.fr and tla-periat.fr websites. The same applies to any costs (if any) that might be incurred by your use of the MathJax application necessary to view certain portions of these domains.
The provider is not liable to the user for any damage that downloading or copying image or text material might cause to the user's computer.
Use of artificial intelligence (AI) provided by the hosting service
The hosting service (SiteW) provides a specific artificial intelligence tool: Waia and Waia 2.0.
I use it to translate my French texts into the English and/or the German languages.
These translations are proofread and, if necessary, corrected within the limits of my language skills; therefore, they may contain errors. I bet my pardon for the disagreement. Please feel free to contact me if you want to propose modifications making my texts better.
External links to other domains and websites
Hyperlinks are made available on certain pages. They provide access to various external domains and websites. They are offered after being checked and when this procedure is authorized (with or without prior request for authorization). However, I have no influence over these domains and their content. This is the reason why I cannot assume any responsibility for their content. This remains exclusively the responsibility of their respective owners and operators. Continuous monitoring of these hyperlinks is not humanly feasible.
In the event that you notice the existence of inappropriate content, I would be grateful if you could report it to me; I will then take the necessary action to deactivate it.
1) Introduction and contact details.
I am pleased that you are visiting my websites hades-home.fr and tla-periat.fr and I thank you for your interest.
In the following, I inform you about the handling of your personal data when using my websites.
Personal data here refers to all data with which you can be personally identified. Within the meaning of the General Data Protection Regulation (GDPR), the controller responsible for the processing of personal data is the natural or legal person who alone or jointly with others decides on the purposes and means of the processing of personal data.
The only personal data that I, Thierry PERIAT, Am Blasiwald 36, 79183 Waldkirch, Germany, email: contact@tla-periat.fr, can access are the surname and email address of a visitor who has decided to contact me; for more details, please see point 3) below.
The web hoster SiteW is responsible for all other data; please refer to their privacy policy.
The websites hades-home.fr and tla-periat.fr use SSL or TLS encryption for security reasons and to protect the transmission of personal data and other confidential content (e.g. inquiries to the controller). You can recognize an encrypted connection, for example, by the character string https:// and the lock symbol in your browser bar.
2) Data collection when visiting my websites.
When using my websites hades-home.fr and tla-periat.fr, Google Search Console only collects completely anonymous information, and only if you allow it.
I have no influence or knowledge regarding the data that the webhoster may collect during your visits.
3) Contacting me.
When contacting me (e.g. via contact form or email), personal data is collected. Which data is collected in the case of using a contact form can be seen from the respective contact form; namely: the surname and your email address.
This data is stored and used exclusively for the purpose of answering your request.
The legal basis for processing this data is my legitimate interest in answering your request appropriately.
Your data will be deleted after final processing of your request. This is the case when it can be inferred from the circumstances that the matter in question has been finally clarified and provided that there are no statutory retention obligations to the contrary.