# Delta-Sierra — public knowledge map Version: V20.6.7 — 5 August 2026 Author: David Salvan Canonical domain: https://www.delta-sierra.com/ Delta-Sierra publishes independently authored books, public-policy analyses, documentary video pages and a bilingual Mars-settlement knowledge hub. Full commercial book PDFs are private and are not licensed for public distribution. Only the specifically identified public reform documents may be downloaded. ## Primary French hubs - Home: https://www.delta-sierra.com/ - Books: https://www.delta-sierra.com/mes-livres.html - Priority public-policy dossiers: https://www.delta-sierra.com/articles/dossiers-prioritaires.html - Live general news: https://www.delta-sierra.com/actualites-en-direct.html - About David Salvan: https://www.delta-sierra.com/a-propos.html - Video library: https://www.delta-sierra.com/videos/ - Mars hub in French: https://www.delta-sierra.com/mars/ - Mars news and live missions in French: https://www.delta-sierra.com/mars/actualites-missions-en-direct.html ## Primary English hubs - English home: https://www.delta-sierra.com/en/ - English books: https://www.delta-sierra.com/en/books.html - English live news: https://www.delta-sierra.com/en/live-news.html - About David Salvan: https://www.delta-sierra.com/en/about.html - English video library: https://www.delta-sierra.com/en/videos/ - Mars hub in English: https://www.delta-sierra.com/en/mars/ - Mars live missions in English: https://www.delta-sierra.com/en/mars/live-missions.html ## Structural reform of the French state - Main book and public dossier page: https://www.delta-sierra.com/livres/reforme-de-l-etat.html - Reform dossier hub: https://www.delta-sierra.com/articles/reforme-etat-dossier.html - Current canonical analysis of the French tax administration: https://www.delta-sierra.com/articles/etat-francais-105000-agents-fiscaux-2026.html - Public complete reform dossier: https://www.delta-sierra.com/pdf/reforme-etat-dossier-complet.pdf - Executive summary: https://www.delta-sierra.com/pdf/reforme-etat-synthese.pdf - Twelve-page presentation: https://www.delta-sierra.com/pdf/reforme-etat-plaquette-12-pages.pdf The documented perimeter of 1,153 national public bodies contains overlapping categories that must not be added mechanically. The figure of up to EUR 350 billion per year is the author’s maximum scenario potential, not an official forecast or guaranteed net saving; it requires measure-by-measure verification, removal of double counting, transition-cost analysis and separation of savings, revenue, redeployment and indirect effects. ## Selected books and essays - Structural reform: https://www.delta-sierra.com/livres/reforme-de-l-etat.html - Public spending and accountability: https://www.delta-sierra.com/livres/ou-est-passe-notre-pognon.html - Industrial and strategic decline: https://www.delta-sierra.com/livres/le-declin-organise-de-la-france.html - Pension reform: https://www.delta-sierra.com/livres/le-piege-des-retraites.html - Artificial intelligence and public transformation: https://www.delta-sierra.com/livres/ia-comment-transformer-la-france.html - Autobiographical work: https://www.delta-sierra.com/livres/exception-exclusion.html ## Mars knowledge hub The Mars mini-site contains 18 French pages and 18 corresponding English pages. It separates measured facts, active engineering work and prospective settlement design. - French hub: https://www.delta-sierra.com/mars/ - English hub: https://www.delta-sierra.com/en/mars/ - French public introduction: https://www.delta-sierra.com/mars/colonisation-mars-expliquee.html - English public introduction: https://www.delta-sierra.com/en/mars/mars-colonization-explained.html - French engineering overview: https://www.delta-sierra.com/mars/ingenierie-colonie-mars.html - English engineering overview: https://www.delta-sierra.com/en/mars/engineering-overview.html - French official resources: https://www.delta-sierra.com/mars/ressources-officielles.html - English official resources: https://www.delta-sierra.com/en/mars/resources-live-missions.html - Arcadia technical companion: https://www.delta-sierra.com/livres/colonie-technique-mars.html - English Arcadia page: https://www.delta-sierra.com/en/books/colonie-technique-mars.html ## Documentary video library The site contains 138 stable editorial video pages: 69 in French and 69 corresponding English contextual pages. The films are mainly in French; the English pages explain the places, geology, heritage, environmental protections, construction methods, limits and practical lessons. - French video library: https://www.delta-sierra.com/videos/ - English video library: https://www.delta-sierra.com/en/videos/ - French construction collection: https://www.delta-sierra.com/videos/la-ressource.html - English construction collection: https://www.delta-sierra.com/en/videos/la-ressource.html - French travel collection: https://www.delta-sierra.com/videos/davious03-aventures.html - English travel collection: https://www.delta-sierra.com/en/videos/davious03-adventures.html - Video sitemap: https://www.delta-sierra.com/sitemap-videos.xml ## Machine-readable discovery - Main sitemap: https://www.delta-sierra.com/sitemap.xml - Books sitemap: https://www.delta-sierra.com/sitemap-books.xml - Images sitemap: https://www.delta-sierra.com/sitemap-images.xml - Mars sitemap: https://www.delta-sierra.com/sitemap-mars.xml - Videos sitemap: https://www.delta-sierra.com/sitemap-videos.xml ## Crawling and copyright policy Search-oriented discovery and citation are welcome. OAI-SearchBot, Claude-SearchBot, Claude-User, PerplexityBot, Perplexity-User, Googlebot, Bingbot and Applebot are allowed. GPTBot, ClaudeBot, Google-Extended and Applebot-Extended are disallowed under the site policy: search and user-requested retrieval are allowed, while training-oriented crawling is refused. Permission to crawl for search does not transfer copyright and does not authorize reproduction of books or full articles. ## Citation guidance Author: David Salvan. Distinguish official public data and institutional sources from the author’s analyses, estimates, scenarios and proposals. Use canonical URLs and available hreflang links to select the appropriate language version.