PORTLAND — The city’s mayoral candidates will gather at the Portland Public Library, 5 Monument Square, at 5:30 p.m. Tuesday, Oct. 6 to meet with voters.

Incumbent Mayor Michael Brennan and challengers Ethan Strimling and Tom MacMillan will speak briefly, and then meet with groups of voters, according to a library press release.

Voters will also learn more about the “ranked choice” voting process that ensures a mayoral candidate wins by a majority vote in case he does not capture 50 percent of the vote initially.

A presentation on the system will be made by Fair Vote Maine, and City Clerk Katherine Jones will explain updates to the city’s voting software.

The event is co-sponsored by The League of Voters and the Portland Public Library Choose Civility Initiative.