For those requiring visas to attend SILAP 2018 in Canada, we note now the helpful link hosted by the Fields Institute:

http://www.fields.utoronto.ca/resources/for-visitors#immigration

and also that of the visa website of the federal government department "Immigration, Refugees, and Citizenship Canada":

https://www.canada.ca/en/immigration-refugees-citizenship/services/visit-canada.html

Visa wait-times are typically much shorter than for visitors to the United States, but we recommend beginning the process immediately. Check current wait-times at: https://www.canada.ca/en/immigration-refugees-citizenship/services/application/check-processing-times.html

On 11 October, sample wait-times: China: 15 days; Russia: 22 days; India: 44 days; Pakistan: 34 days.

Letters of invitation are issued by staff from the Fields Institute: June@Fields

For the Fields Institute to prepare a Letter of Invitation that meets Citizenship and Immigration Canada requirements (http://www.cic.gc.ca/english/visit/letter.asp ), please complete this form: http://www.surveygizmo.com/s3/2605838/FI-Visitor-Visa-Application-Letter .