Symmetries of Discrete Objects    

Rotorua, New Zealand, 10-14 February 2020

Overview : Venue : Participants : Schedule : Travel : Accommodation : Social programme : Rotorua Tourist Highlights : Registration : Organisers : Sponsors


This conference will be held at
Rotorua (which is one of New Zealand's most famous cultural, historic and scenic cities) the week 10-14 February 2020.

Important note: February is summer in New Zealand.

The aim of the conference is to bring together researchers working in various inter-related fields involving symmetries of discrete objects such as graphs, maps, polytopes and Riemann surfaces, to introduce their approaches and discoveries to one another, and to promote joint research in and between these fields. To achieve this we will have a small number of keynote talks, several contributed talks, at least one open problem session, and ample time for discussions and problem solving.

The conference will be well-suited (but certainly not restricted) to those who have previously attended the SIGMAC/SIGMAP series of meetings in the US, Portugal and Mexico (every four years since 1998), the GEMS meetings (in Slovakia), the 4-yearly graph theory conferences at Bled (Slovenia), the AMS special sessions on Automorphisms of Surfaces, conferences in China on Group Theory and Algebraic Combinatorics, and the previous two conferences on the above topics in Queenstown in 2012 and 2016. Anyone with interest in automorphisms of discrete structures is welcome to consider attending.

The following people (so far) have been confirmed as invited keynote speakers:

Participants should aim to arrive in Rotorua by the evening of Sunday 9 February (or early on the morning of Monday 10 February), and the meeting will finish at lunchtime on Friday 14 February.

If you plan to attend, then please register as soon as possible, under Registration below.

Payment of registration fees is not required immediately on registration.
The final date for "early-bird" payment of registration costs is 4 January 2020, but we would like to know likely numbers well before then.
Ideally, we would like to know the expected number of participants by early November 2019.

All participants who wish to stay at the conference venue hotel should book a room (at special conference rates) as quickly as possible.
See below under "Accommodation".
No advance payment is likely to be needed, but the number of rooms available is limited and will decrease as the date of the conference approaches (so that the hotel can allow other guests to take the rooms that have not been booked).

The date for registration (4 January 2020) has now passed.
If you still wish to attend but did not register by the due date, then you should contact Marston Conder immediately.


This conference and workshop will take place at Rotorua, a lakeside city near the centre of the North Island of New Zealand, the week 10-14 February 2020.

The weather in Rotorua in February is usually very pleasant, with daytime temperatures between 20 and 24 degrees C, and night-time temperatures around 12 degrees C, and relatively little rain at that time of year.

All lectures/talks will take place at the Millennium Hotel Rotorua, which is a 4.5 star hotel just 5 to 10 minutes walk from the centre of Rotorua and the lakefront.


Click here for a map of Rotorua. The address of the Millennium Hotel is 1270 Hinemaru Street, Rotorua. Complimentary wifi is available throughout the hotel.

Morning and afternoon teas will be provided for conference participants (as per the Schedule below), and breakfast is also available at the conference venue for an additional cost of NZ$20 per person per day (payable directly to the Millennium Hotel if it is not already included in your room rate).

There are dozens of cafés, restaurants and bars within 5 to 10 minutes walk of the conference venue where participants can buy lunch and/or dinner. (These meals are not covered by the registration fee.)

We particularly recommend Eat Streat for its bars and restaurants. This is just 10 minutes walk from the conference venue.


Here is a list of participants (as at 7 February 2020):

If you believe you have registered but your name is not on this list, then you should contact
Marston Conder immediately.


Conference lectures will be given at the following times:

Morning and afternoon teas will be provided for all registered participants on Monday to Friday mornings and on Monday, Tuesday and Thursday afternoons.

A welcome function will be held on the Sunday evening at the conference venue, and a conference dinner on the Thursday evening at the historic Blue Baths.

The complete schedule is now available here.

Abstracts for all talks can be downloaded in a pdf file from here.


The quickest way to reach Rotorua is by air. There are a few direct flights each day from Auckland, Wellington and/or Christchurch, with Air New Zealand. If you are travelling to New Zealand from overseas, then we recommend that you consider asking for a return airfare to Rotorua (rather than to Auckland, Wellington or Christchurch), as this could be be much less expensive than booking the final leg (to Rotorua) separately. In fact you might like to check the airfares available through Orbit World Travel), the University of Auckland's travel supplier, which can issue airline tickets.

It is also possible to travel from Auckland to Rotorua (228 km) by car through scenic countryside in approx. 3 hours, or by bus in 4 hours (see InterCity bus service).

Also if you are visiting from overseas, you might or might need a visa to enter New Zealand.
See the Visiting New Zealand website for more details.

And (this is important) even if you don't need a visa, you may need an NZeTA (New Zealand Electronic Travel Authority) before you leave for New Zealand.
See the NZeTA website for more details.

Rotorua airport is approx. 9 km from the conference venue, and there are numerous transport options: bus (NZ$10 to $18), shuttle (NZ$22), taxi (NZ$30) or rental car.
Click here for details.

Note: 1 New Zealand dollar is approx. 0.60 Euros, 0.51 GBP, 0.66 US dollars.


Participants (other than invited speakers) should organise and book their own accommodation.

A number of "Superior Rooms" have been set aside at the conference venue, the Millennium Hotel Rotorua, at a conference daily rate of NZ$195 per room, plus NZ$20 per person for breakfast.
These rooms have private bathroom, free wifi, a flat-screen TV, small refrigerator, and tea/coffee making facilities, and the above rate includes GST (Goods & Services Tax).
This hotel has a fitness centre, restaurant/bar, spa, swimming pool, and free off-street parking. Participants who wish to book a room at the Millennium Hotel should do that as soon as possible.

To make an accommodation booking at Millennium Hotel at the conference rates, send an email to, stating that you are attending the conference SODO 2020.

The conference rates will apply until a few weeks before the conference begins, but the number of those rooms is limited.
Payment is not likely to be expected until the week of the conference, but the hotel might require a credit card to hold the booking.
There may also be other rooms available at the Millennium Hotel (at the hotel's publicly advertised rates).

There are plenty of other accommodation possibilities in Rotorua, near the conference venue, ranging from other hotels and very good quality motels to self-catering apartments, bed & breakfast rooms and backpacker hostels. For some of these possibilities, click here, or try or or, for example.

Social Programme

The following events are planned:

There will be no conference excursion, but there will be free time on the Wednesday afternoon for people to organise their own sightseeing, walking or other activities.
For some of these, see "Rotorua Tourist Highlights" below.

Rotorua Tourist Highlights

Rotorua is a great place to visit. It is well known for its geothermal activity, indigenous Maori culture, sightseeing and all kinds of tourist activities.
Many possibilities can be found
here. Particular highlights in and around Rotorua include the following:

Also for fans of "the Hobbit" and "Lord of the Rings" is something special: which is just an hour away (by car or by Hobbiton tour bus), on the way between Auckland and Rotorua.



Registration for the conference includes participation in the conference lectures, morning and afternoon teas (as per the Schedule above),
the welcome party and conference dinner.

Please register by early November 2019, so we have a clear idea of expected numbers. Registration payment is not expected until 4 January 2020.

Registration rates are as follows:

Registration Options Payment by
4 January 2020
Payment by
27 January 2020
Participant registration (including welcome party and conference dinner) Type P1 (NZ$420) Type P2 (NZ$480)
Additional person for welcome party Type W1 (NZ$60) Type W2 (NZ$65)
Additional person for conference dinner Type D1 (NZ$100) Type D2 (NZ$110)

All costs shown in the above table include NZ Goods & Services Tax (GST).

Total payment should be made by inter-bank transfer, by the due date for the lower rates.
We recommend the use of
TransferWise for bank transfer, as it has a low commission rate and can guarantee that
we receive the expected amount (in contrast to other transfer systems which often charge unexpected extra fees).
We will provide bank details once we have accepted your registration, and a receipt following payment.

If you wish to register for this conference and workshop, then please choose from among the above options,
fill in the form below, click on the "Submit" button, and then send the email that should pop up containing your details:

Your name

Your affiliation/institution

Your email address

Brief title of your talk (if you wish to give one)

Registration type (copy from above table)

Additional person(s) for reception (enter number and type)

Additional person(s) for dinner (enter number and type)

Note: The above form works well with the "Firefox" and "Opera" browsers, but not well with "Safari".
If pressing "Submit" fails to bring up an email window containing the details you have entered in the boxes,
or if you don't receive an acknowledgement within five days, then please just copy them clearly into an email to Thanks!

Also, once again please note that you need to book your own accommodation: the conference registration process
is completely separate from the accommodation booking process

Organising Committee


We are grateful to the following organisations for their support of this conference:


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