The game-theory tag has no usage guidance.

**14**

votes

**0**answers

450 views

### The multiplication game on the free group

Fix $W\subseteq\mathbb F_2$ and consider the following two-person game: Player 1 and Player 2 simultaneously choose $x$ and $y$ in $\mathbb F_2$. The first player wins, say one dollar, iff $xy\in W$. ...

**9**

votes

**3**answers

449 views

### Representing a real number as the value of a countably infinite game

Is it true that for any real number $p$ between 0 and 1, there exist finite or infinite sequences $x_m$ and $y_n$ of positive real numbers, and a finite or infinite matrix of numbers $\varphi_{mn}$ ...

**2**

votes

**3**answers

1k views

### Motivation for the Sprague-Grundy theorem

The Sprague-Grundy theorem states that every impartial combinatorial game under the normal play convention is equivalent to a (unique) nimber.
What does the equivalence relation thus defined tell us ...

**5**

votes

**2**answers

591 views

### Pursuit-Evasion on a Manifold

I know pursuit-evasion has been studied in many contexts, including
on a manifold (e.g., Melikyan,
"Geometry of Pursuit-Evasion Games on Two-Dimensional Manifolds"),
but I have not seen this version:
...

**7**

votes

**1**answer

476 views

### Cake-cutting and amenable groups

I recently heard Alan Taylor speak about envy-free fair division and started wondering if questions like these make sense if we replace finitely additive measures with invariant means on amenable ...

**6**

votes

**1**answer

802 views

### Drawing lines and removing squares - an Alice and Bob game

Thought about the following while in a Complex Analysis lecture:
Let there be a $N \times N$ grid of squares and two players $A$ and $B$. First, $A$ needs to draw a line $l$ that needs to intersect ...

**1**

vote

**0**answers

895 views

### What would be nice open problem in evolutionary game theory ? [closed]

Hello,
i was trained as a biologist, but have taught myself mathematics to a level that is roughly equivalent to that of a masters degree in math. I decided to try do some phd-research in ...

**2**

votes

**3**answers

430 views

### Why are Nash-Equilibria inside the Simplex S_n unique ?

Hello,
i came across a remark that states that nash equilibria inside the simplex S_n are unique. Or stated differently: If there is more then one such equilibrium, then they have to lie on the ...

**5**

votes

**1**answer

535 views

### Decay of Relative Growth in Conway's Game of Life

Intro
The question is about Game of Life.
Let us denote the set of points obtained from initial configuration $A$ after $m$ steps as $A(m)$ (we are only interested in finite initial configuration, ...

**3**

votes

**2**answers

606 views

### Set Cardinality Game - Can a player with numbers in R win over a player with numbers in N as each of them in one turn has to present a new number?

Let there be 2 players, p$\mathbb{N}$ and p$\mathbb{R}$. They are playing the Set Cardinality Game where p$\mathbb{N}$ has to present some number n that has not been used in the game so far by either ...

**8**

votes

**0**answers

2k views

### Group Theory, Game Theory, a bit of Philosophy and a post in Tao's blog

I've decided to write this post after reading the incredibly beautiful and highly recomended post by Terence Tao ...

**4**

votes

**1**answer

1k views

### Conditioning on one term of a sum of random variables

Let $\theta$ be normally distributed with mean $\bar \theta$ and variance $s^2$. Let $Z$ be normally distributed with mean $0$ and variance $\sigma^2$, and chosen independently of $\theta$. Define ...

**5**

votes

**1**answer

870 views

### Are there any interesting connections between game theory and engineering?

I am doing a senior project and it must be based off game theory, but I am having trouble finding any connections to engineering, possibly structural, or architectural, maybe even civil or mechanical. ...

**15**

votes

**5**answers

2k views

### Irreversible chess

Suppose we play a chess-variant, where any finite number of pieces are allowed, and the board is as large as we wish, but only two kings in total. And there is no 50 move-rule, no castling and no ...

**8**

votes

**2**answers

416 views

### A competitive root finding game

Inspired by a question about bisection I wondered about the following: The are two players X and Y and a moderator Z who knows two (random,independent, uniformly chosen) hidden reals $x$ and $y$ from ...

**9**

votes

**2**answers

1k views

### The duel problem

The following duel problem is due to Ben Polak (maybe there's earlier origin, which I'll be glad to be informed about). The rule is as follows:
Two players 1 and 2 start a duel $N$ steps away from ...

**3**

votes

**2**answers

440 views

### Truel extended to n persons

n players numbered 1~n play a shooting game. Their accuracy rates p1~pn are strictly between 0 and 1, and strictly increases from p1 to pn. This is common knowledge.
Before the game starts, the ...

**0**

votes

**1**answer

297 views

### Zermelo's stone game in 3 dimensional space

Well, first let me make this clear: I'm actually not sure about the background of the game, whether it was really posed (and solved) by Zermelo. But I'll state the game anyway (perhaps someone can ...

**7**

votes

**4**answers

1k views

### Infinite games: are they well defined?

It is just my curiosity about this question where we have an infinite game and (according to the answers) winning strategies for both players. I am familiar with terminating games only, and I am ...

**3**

votes

**2**answers

563 views

### Non-measurable sets and Determinacy…

Assume AC. Suppose $X$ is a subset of the irrationals (Baire Space) for which neither player has a winning strategy (i.e. the game $G(\omega, X)$ is not determined). Is $X$ non-measurable in the ...

**3**

votes

**1**answer

323 views

### Approximating the maximin value of a zero-sum game

For square matrix $P$, define
$$V(P) = \sup_x \inf_y x^T P y^T$$
where $x$ and $y$ lie on the unit $n-1$-simplex.
($P$ is a payoff matrix for a symmetric game, $x$ and $y$ are mixed strategies, ...

**5**

votes

**0**answers

882 views

### A Fun Game with Coins [closed]

Assume you have a pair number of coins $2n$ with possibly different values, ordered in a line. Let us enumerate the coins as $x_1,x_2,\ldots,x_{2n}$. The coins are not ordered in any particular way.
...

**6**

votes

**2**answers

258 views

### Truthful multi-unit auctions that guarantee selling all items

Suppose an auctioneer has $k$ units for sale. There are $n$ bidders, each of whom are interested in a single good, and have value $v_i$ for it. If bidder $i$ has to pay $p_i$ and gets the good, he ...

**2**

votes

**2**answers

694 views

### Games of imperfect information (e.g. Blackwell's games) in Set Theory?

Hello,
Intro about standard two player games
Gale-Stewart games are the well-known games played by two Players $I$ and $II$, which in turn play natural numbers for infinitely many ($\omega$) steps. ...

**3**

votes

**2**answers

615 views

### What is the optimal strategy for participants in this situation?

Consider a simplified version of eBay where everyone bids once on an item, nobody sees each-other's bid, and the highest bid wins. This is called a "First-price sealed-bid auction".
One day you find ...

**2**

votes

**1**answer

969 views

### Applications of Algebraic Geometry in Evolutionary Game Theory

Hello,
do you know any papers or books that use algebraic geometry in evolutionary game theory ?

**4**

votes

**1**answer

382 views

### Is the convex combination of two potential games a potential game?

My question: is the set of potential games closed under convex combinations?
An n player game with action set $A = A_1 \times \ldots \times A_n$ and payoff functions $u_i$ is called an exact ...

**12**

votes

**6**answers

1k views

### Untrustworthy people picking a random number

Inspired by the party game Mafia, in particular those situations where nobody is clearly innocent or guilty and the group wants to decide on someone random to eliminate.
Suppose n people each have ...

**11**

votes

**5**answers

4k views

### Guess a number with at most one wrong answer

Consider a game where one player picks an integer number between 1 and 1000 and
other has to guess it asking yes/no questions.
If the second player always gives correct answers than it's clear that ...

**4**

votes

**1**answer

293 views

### Subsets of sequences of natural numbers vs. strategies under ZFC

This question is related to a previous question of mine:
Determinacy interchanging the roles of both players
Given any set A of sequences of natural numbers, every strategy (no matter for which ...

**3**

votes

**2**answers

487 views

### Determinacy interchanging the roles of both players

Let me refer to Jech's "Set Theory" Chap. 33 Determinacy:
"With each subset A of $\omega^\omega$ we associate the following game $G_A$, played by two players I and II. First I chooses a natural ...

**11**

votes

**1**answer

736 views

### The Worst Possible Winner

First a little background. In racing it is possible for a player to win a tournament without winning a single race, however, how bad can a tournament winner actually be? Can a player win a tournament ...

**4**

votes

**1**answer

749 views

### Responses from mathematicians concerning Flash trading [closed]

Have there been any responses from the mathematics community regarding flash trading, for example from a game theory or system dynamics point of view? Please answer with personal comments or ...

**5**

votes

**2**answers

708 views

### Is perfect play possible in continuous rock-paper-scissors? game “step size” vs. “acceleration”

The first part of my question is simple: Is every game continuous in time and strategy-space also a game of perfect information with a good equilibrium? For example, consider rock-paper-scissors. The ...

**1**

vote

**2**answers

275 views

### How to assign a score to items based on a set of partial rankings

I have the following setup:
There is a collection of items I and a collection of partial rankings V. That is, an element of V is a total ordering on a subset of I. There is no expectation of ...

**8**

votes

**3**answers

1k views

### Weighted Regular Graphs

The following graph theoretic notion appeared in an economics paper entitled: "Prize competition under limited comparability, by Michele Piccione and Ran Spiegler which studies models of economics ...

**23**

votes

**2**answers

1k views

### Five Front Battle

Two generals are fighting a five front battle. Each general has 1 unit of army, which he divides into five separate armies that he sends to the five fronts. If one general sends more army to a front ...

**2**

votes

**1**answer

950 views

### About the Shannon Switching Game

I was playing around with the Shannon Switching Game for some planar graphs, trying to get some intuition for the strategy, when I noticed a pattern. Since I only played on planar graphs, I'll ...

**0**

votes

**1**answer

4k views

### Baccarat and the way to win it [closed]

Recently, A friend of mine tell me something about "Baccarat"--a hot game of gambling.and he want to know some way to play it that can win more money. and he guess that math can help to do this. But I ...

**21**

votes

**1**answer

631 views

### The density hex

Gale famously showed that the determinacy of n-player, n-dimensional Hex is equivalent to the Brouwer fixed point theorem in n dimensions.
We can (and Gale does) view this as saying that if you ...