Effective since 25/03/2026
These terms and conditions of use (hereinafter "T&C") legally govern the use of the website www.ca9.fr (hereinafter "the Site") and all of its subdomains. By accessing the Site, any user (hereinafter "the User") unconditionally accepts these T&C. If the User does not accept these T&C, they are invited to leave the Site.
CA9 SAS reserves the right to modify these T&C at any time. The applicable T&C are those in force on the date of the last update indicated at the top of this page. The User is invited to consult this page regularly.
The purpose of the Site is to present the activities of CA9 SAS, including:
The Site is freely accessible from any device with an Internet connection. All costs related to accessing the Site (hardware, Internet connection, etc.) are borne by the User.
CA9 SAS uses all reasonable means to ensure continuous access to the Site, 24 hours a day, 7 days a week. However, access may be interrupted without notice for maintenance, updates, or in the event of force majeure. CA9 SAS shall not be held liable for the consequences of such interruptions.
CA9 SAS reserves the right to refuse access to the Site, unilaterally and without prior notice, to any User who does not comply with these T&C.
The Site provides a contact form enabling Users to send enquiries to CA9 SAS. The User undertakes to provide accurate and truthful information.
The data entered in the form (name, company, email, subject, message) are transmitted by email to the data controller. They are not stored in a database and are processed in accordance with the privacy policy.
A verification mechanism (captcha) is in place to prevent automated submissions. CA9 SAS reserves the right not to respond to messages deemed abusive, offensive, or unrelated to its activities.
All Content on the Site is the exclusive property of CA9 SAS or its authors, and is protected by French and international intellectual property laws, in particular Articles L.111-1 et seq. and L.335-2 et seq. of the French Intellectual Property Code.
Any reproduction, representation, modification, publication, transmission, distortion, whether in whole or in part, of the Content, by any means whatsoever and on any medium whatsoever, is prohibited without the prior written consent of CA9 SAS. Any unauthorized use constitutes infringement liable to civil and criminal prosecution.
The scientific publications accessible via the Site (in particular the Quantum Theory of Topological Knots and the Topological Photovoltaic Panel) are published under the Creative Commons Attribution Non Commercial No Derivatives 4.0 (CC BY-NC-ND 4.0) licence. Attribution to the author is mandatory. Any commercial use or modification is prohibited without prior authorization.
The trademarks, logos and distinctive signs displayed on the Site are the property of CA9 SAS. Any unauthorized use constitutes infringement within the meaning of Articles L.713-2 et seq. of the French Intellectual Property Code.
The information on the Site is provided for informational purposes only and has no contractual value. CA9 SAS endeavours to ensure the accuracy of the information but does not guarantee the absence of errors or omissions. CA9 SAS shall not be held liable for:
The User is responsible for how they use the Site and the information they enter on it. The User undertakes not to:
The processing of personal data and the use of cookies are detailed in the privacy policy and the cookie policy, accessible from the legal notice page.
In summary:
The Site may contain links to third-party websites (in particular Zenodo for scientific publications). CA9 SAS exercises no control over these websites and disclaims all liability regarding their content, availability or personal data protection practices. Activating these links is the sole responsibility of the User.
Any website wishing to link to the Site may do so without prior authorization, provided that such link does not damage the image of CA9 SAS and is not presented in a misleading manner. The use of framing or inline linking techniques is prohibited without prior written authorization.
The Site publishes scientific and technical content as part of the research activities of CA9 SAS. This content is provided for informational purposes only and does not in any way constitute:
The stated performance figures (in particular for topological photovoltaics) are theoretical values derived from modelling. They do not constitute validated experimental results and shall not engage the liability of CA9 SAS in the event of any discrepancy with reality.
CA9 SAS shall not be held liable for failure to perform its obligations in the event of a force majeure event as defined by Article 1218 of the French Civil Code, including but not limited to: natural disaster, fire, equipment failure, power or telecommunications outage, cyberattack, pandemic, government decision, or any other event beyond the reasonable control of CA9 SAS.
If one or more provisions of these T&C are held invalid or declared as such pursuant to any law, regulation or final ruling by a court of competent jurisdiction, the remaining provisions shall retain their full force and effect.
The failure of CA9 SAS to exercise any right provided for under these T&C shall not constitute a waiver of such right. No tolerance shall be construed as an amendment to the T&C or as a waiver of the right to invoke any of their provisions.
These T&C are governed by French law. In the event of a dispute relating to the interpretation or performance of these T&C, the parties shall endeavour to reach an amicable settlement.
Failing amicable resolution within 30 days, the dispute shall be brought before the competent courts within the jurisdiction of the Judicial Court of Melun, notwithstanding multiple defendants or third-party claims, including for emergency proceedings and interim measures by way of summary or ex parte application.
For any questions regarding these T&C, the User may contact CA9 SAS: