Puzzle Hunt by Solving Fun

Below are three math themed puzzles created by Solving Fun. They are in the puzzle-hunt style, meaning they come with no instruction, and the first step is to figure out what to do, and use the information or data to extract some meaning. 
You may (and should) use the internet and outside sources to search for information to help solve these problems. 
Answers will be either a word or phrase in English. Click on the “Submit Your Answer” button to check if your answer is correct.
The form will validate if and only if this is the correct answer. You should write each answer in lowercase and without spaces.

Puzzle 1: Virtual Confusion

As you are attending JMM, you are getting to know these mathematicians. They all gathered on Zoom in preparation for the meeting. At first they were confused by the transition to a virtual event, but eventually they adapted and even had some extra time to discuss a math topic.

You should be able to identify all participants of this Zoom call, possibly with the help of a relevant webpage.

The transition to a virtual meeting left each participant somewhat mixed-up.

To find the number under the fourth ink stain, do the same work again.

Puzzle by Vivien Ripoll

Puzzle 2: Obscure Elements in Sequences

You take a break between two talks to grab something in your kitchen.
Suddenly, from a book of recipes falls a fragment of paper that you have never seen before.

Each ink stain covers exactly one integer. Each line is an independent sequence. If you can’t guess the sequence, feel free to look it up.

The title is a clue for a very useful website to look for sequences.

To find the number under the fourth ink stain, do the same work again. And don’t forget that the final answer should be an English word.

Puzzle by Chen Wang & Vivien Ripoll

Puzzle 3: A Piece of Advice

While listening to a talk, you are distracted by a notification from your university email. You just received an enigmatic reply from your advisor.

Every line is a reference to a preprint. If you don’t know where to look, ask an archivist, or even better, an arxivist!

Examine the title of each paper you found. Can you figure out anything special?

The last step is the same as the previous 10 steps 😉

Puzzle by Vivien Ripoll

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