What Are Cookies
Cookies are small text files stored on your device when you visit a website. They help the site remember your preferences, understand how you interact with the site, and, where enabled, support optional features such as analytics or advertising. This policy explains how the Historical Mathematics Library uses cookies and similar technologies.
Essential and Functional Cookies
Some cookies are necessary for the basic operation of the catalogue. These include cookies that remember your session, maintain your privacy preferences (such as your consent choices), and enable secure access to any account features you may use. These cookies are set by us (first-party) and do not require your prior consent because they are essential to provide the service you request.
Preference and Customisation Cookies
We may use cookies to remember your preferred display settings, such as text size, theme, or language. These cookies are optional; if you disable them, the site will still function but may not retain your personal preferences between visits.
Analytics (Where Enabled)
Where analytics are enabled, we may use first-party cookies to collect anonymous information about how visitors use the catalogue — for example, which pages are most frequently viewed, how users navigate between sections, and whether any errors occur. This helps us improve the site’s structure and content. No personally identifiable information is collected through these cookies. You can opt out of analytics cookies by adjusting your browser settings or using our consent management tool (if available).
Advertising (Where Ads Are Displayed)
If advertising is shown on the catalogue, we may use third-party cookies from Google and other advertising partners to deliver relevant ads, measure ad performance, and prevent the same ad from appearing too often. Google’s use of advertising cookies enables it and its partners to serve ads based on your visits to this site and other sites on the internet. You can learn more about Google’s advertising practices and opt out by visiting the Google Ads Settings page. We do not control the cookies set by third-party advertisers, and their use is subject to their own privacy policies.
Local Storage and Similar Technologies
In addition to cookies, we may use local storage (such as HTML5 localStorage) to store data on your device for similar purposes — for example, to cache reading preferences or to improve load times. Local storage is not automatically cleared when you close your browser, but you can manage it through your browser settings.
Session and Persistent Cookies
Cookies may be session-based (deleted when you close your browser) or persistent (remain on your device for a set period or until you delete them). The exact duration varies by cookie type, but we do not set persistent cookies longer than necessary to fulfil their purpose, typically up to two years for preference cookies and up to 13 months for analytics or advertising cookies, where applicable.
Your Consent Choices
When you first visit the catalogue, you may see a cookie consent notice that allows you to accept or reject optional cookies (such as analytics and advertising). You can change your preferences at any time by clicking the “Cookie Preferences” link available in the site footer. Where consent is required, we will not set optional cookies until you have given your affirmative consent.
Withdrawal of Consent
If you previously consented to optional cookies but later wish to withdraw that consent, you can do so via the cookie preferences tool or by clearing cookies in your browser. Withdrawing consent will not affect the lawfulness of any processing that occurred before the withdrawal.
Browser Controls
Most web browsers allow you to control cookies through their settings. You can typically block or delete all cookies, or configure your browser to alert you when a cookie is set. Please note that if you disable essential cookies, some parts of the catalogue may not function properly. For detailed instructions, consult your browser’s help documentation.
Practical Effects of Disabling Storage
If you disable all cookies and local storage, the catalogue will still load and you can browse public-domain works, but certain features may be unavailable. For instance, you may need to re-enter preferences each time you visit, and any personalised recommendations or session-based settings will not persist. Disabling analytics and advertising cookies will have no impact on the core reading experience.
Changes to This Policy
We may update this Cookie Policy from time to time to reflect changes in our practices or legal obligations. We encourage you to review this page periodically. Your continued use of the catalogue after any changes constitutes acceptance of the updated policy.
Contact
If you have any questions about our use of cookies, please contact our the catalogue project@ecazu.com.