In order to enable an iCal export link, your account needs to have an API key created. This key enables other applications to access data from within Indico even when you are neither using nor logged into the Indico system yourself with the link provided. Once created, you can manage your key at any time by going to 'My Profile' and looking under the tab entitled 'HTTP API'. Further information about HTTP API keys can be found in the Indico documentation.
Additionally to having an API key associated with your account, exporting private event information requires the usage of a persistent signature. This enables API URLs which do not expire after a few minutes so while the setting is active, anyone in possession of the link provided can access the information. Due to this, it is extremely important that you keep these links private and for your use only. If you think someone else may have acquired access to a link using this key in the future, you must immediately create a new key pair on the 'My Profile' page under the 'HTTP API' and update the iCalendar links afterwards.
Permanent link for public information only:
Permanent link for all public and protected information:
Lewis Bowen: "Entropy, orbit-equivalence and free groups"
Abstract: We would like to classify actions of groups up to measure-conjugacy (MC) and orbit-equivalence (OE). There are also quantitative restrictions on orbit-equivalence, for example, bounded orbit-equivalence (BOE) and integrable orbit-equivalence (IOE) which lie between MC and OE. Entropy is an MC invariant and one of the primary tools in classifying actions up to MC. However, it is not an OE-invariant. Tim Austin proved that it is an IOE-invariant for actions of amenable groups and this result has been extended by Kerr-Li to groups containing a weakly normal amenable subgroup. I will discuss the first result of this kind for actions of non-abelian free groups: f-entropy is BOE-invariant. No knowledge of the classical entropy theory or the f-invariant will be assumed.