martingale

Definitions

  • WordNet 3.6
    • n martingale spar under the bowsprit of a sailboat
    • n martingale a harness strap that connects the nose piece to the girth; prevents the horse from throwing back its head
    • ***
Webster's Revised Unabridged Dictionary
    • Martingale (Naut) A lower stay of rope or chain for the jib boom or flying jib boom, fastened to, or reeved through, the dolphin striker. Also, the dolphin striker itself.
    • Martingale A strap fastened to a horse's girth, passing between his fore legs, and fastened to the bit, or now more commonly ending in two rings, through which the reins pass. It is intended to hold down the head of the horse, and prevent him from rearing.
    • Martingale (Gambling) The act of doubling, at each stake, that which has been lost on the preceding stake; also, the sum so risked; -- metaphorically derived from the bifurcation of the martingale of a harness. Called also Martingale strategy. Such a betting strategy does not change the overall likelihood of winning, but in a short run it increases the probability of winning a small sum, balancing it against an increased probability of losing a large sum.
    • ***
Century Dictionary and Cyclopedia
    • n martingale In a horse's harness, a strap passing between the fore legs, fastened at one end to the girth under the belly, and at the other to the bit or the musrol, or forked and ending in two rings through which the reins are passed, intended to hold down the head of the horse. See cut under harness.
    • n martingale Nautical, a short perpendicular spar under the bowsprit-end, used for guying down the headstays. Also called dolphin-striker. See cut under dolphin-striker.
    • n martingale A mode of play in such games as rouge et noir which consists in staking double the amount of money lost.
    • n martingale In fencing, a bit of twine, fastened to the hilt of a foil, which is caught round one finger of the sword hand to prevent the foil from falling to the ground in case of disarmament.
    • ***
Chambers's Twentieth Century Dictionary
    • n Martingale mär′tin-gāl a strap passing between a horse's forelegs, fastened to the girth and to the bit, to keep his head down: in ships, a short spar under the bowsprit
    • Martingale Also Mar′tingal
    • ***

Etymology

Webster's Revised Unabridged Dictionary
F. martingale,; cf. It. martingala, a sort of hose, martingale, Sp. martingala, a greave, cuish, martingale, Sp. almártaga, a kind of bridle

Usage

In literature:

Right under the martingale with its sharp spear-like head the lifeboat had to lie.
"Heroes of the Goodwin Sands" by Thomas Stanley Treanor
A rope leading from the martingale in-board.
"The Sailor's Word-Book" by William Henry Smyth
Besides, martingales would prevent you from pulling his head round if he should try to jump.
"A New Illustrated Edition of J. S. Rarey's Art of Taming Horses" by J. S. Rarey
They call the game she made, 'playing the martingale!
"Rosemary in Search of a Father" by C. N. Williamson
MARTINGALE rather bluntly told him, he had better learn to ride, before he thought of buying a horse.
"Punch - Volume 25 (Jul-Dec 1853)" by Various
Martingale's a humbug, and only wants to palm upon us some old screw.
"By Birth a Lady" by George Manville Fenn
Bolivio made them martingales.
"The Heritage of the Hills" by Arthur P. Hankins
This, if not a guarantee for their future happiness, is still the best "martingale" the game of marriage admits of.
"Charles Lever, His Life in His Letters, Vol. II (of II)" by Edmund Downey Charles James Lever
Tom Martingale shall not have them for the price he offers.
"Pencil Sketches" by Eliza Leslie
Their saddles were fitted with strong martingales and cruppers and with triple girths so that they could not shift.
"The Inhabitants of the Philippines" by Frederic H. Sawyer
The mounted horseman device was also struck on heart-shaped martingale ornaments.
"American Military Insignia 1800-1851" by J. Duncan Campbell
Breastplates or neck straps may be used for hunting, or the fitting of martingales (necessary sometimes).
"The Barb and the Bridle" by Vielle Moustache
Don't use a martingale unless your horse is a star-gazer, or else tosses his head so as to be able to strike you.
"Patroclus and Penelope" by Theodore Ayrault Dodge
I still played on the martingale, but with such bad luck that I was soon left without a sequin.
"The Memoirs of Jacques Casanova de Seingalt, Vol. II (of VI), "To Paris and Prison" The First Complete and Unabridged English Translation, Illustrated with Old Engravings" by Jacques Casanova de Seingalt
When they began to row Marston's boat was drawn back under the yacht's iron martingale.
"Wyndham's Pal" by Harold Bindloss
Being secured to the breastplate by a standing martingale, it requires no reins.
"Ladies on Horseback" by Nannie Lambert
Major Martingale only snorted.
"Rebecca's Promise" by Frances R. Sterrett
The French martingale is the best.
"The American Horsewoman" by Elizabeth Karr
Hoist up the martingale and rig it, and reeve the martingale stay and gaub-line.
"The Seaman's Friend" by Richard Henry Dana
I do not recommend a martingale if it can possibly be avoided, as it is apt to throw a horse down.
"Automatic Pistol Shooting" by Walter Winans
***

In poetry:

"Oh, fly aloft to the garboard strake!
And reef the spanker boom;
Bend a studding sail on the martingale,
To give her weather room."
"A Sailor's Yarn" by James Jeffrey Roche

In news:

I've been looking for a German martingale for my horse.
He allegedly adopted an approach known in the gambling world as "martingale system": a gambler doubles his bet after each loss and continues to do so until he eventually wins—or runs out of money.
The complex derivatives behind the current financial havoc aren't literally martingales , but what's wrong with the martingale is one of the things that's wrong with the derivatives.
The martingale 's bad reputation is just about as old as the martingale itself.
The martingale framework for detecting changes in data stream, currently only applicable to labeled data, is extended here to unlabeled data using clustering concept.
Law Firm Relocates Schaumburg Offices to 200 N Martingale Road.
Perhaps you would like to discover what a martingale is (hint: not a bird).
***

In science:

Let us find the bracket < ¯ZN (t) > of the martingale ¯ZN (t), i. e. the unique increasing process vanishing at zero, such that ¯Z 2 N (t)− < ¯ZN (t) > is the continuous martingale (see [RY]).
Fluctuations of the free energy in the REM and the p-spin SK models
It will be shown in section 5.1 that it is enough to consider the martingale case since by suitable renormalisation of the random variables (ξa) and (Yn ) we can always limit ourselves in the study of martingales.
Random walks in random environment on trees and multiplicative chaos
As already mentionned the basic point is eq.(4) which says that Gkt |ω i is a local martingale. • The partition function martingale.
Conformal field theories in random domains and stochastic Loewner evolutions
The introduction by Harrison and Kreps (1979), Harrison and Pliska (1981) and Ross (1976) of the notion of equivalent martingale measures created the possibility of solving such problems by martingale duality methods.
Optimal investment with random endowments in incomplete markets
Denote by M′ the set of equivalent local martingale measures Q such that X ′ is a uniformly integrable martingale under Q.
Optimal investment with random endowments in incomplete markets
Let us finally compute the martingale bracket of the normalized trace of the above martingale.
Large deviations and stochastic calculus for large random matrices
Then the sequence Mi = E[Z |Fi ] is an Fi -adapted martingale (the Doob martingale associated with Z ).
Moment inequalities for functions of independent random variables
The second claim is a well-known consequence of the martingale convergence theorem: Given the environment Π, (Zn/µn )n≥0 is a martingale with respect to P+ and the filtration F .
Criticality for branching processes in random environment
It is clear that, for each n, M n is a F n,τ n -martingale and that M is a F τ -martingale.
Stability of solutions of BSDEs with random terminal time
It follows that if wt is a simple (weighted) random walk, then the process v (wt) is ”almost” a martingale, i.e. it is a martingale as long as wt does not reach 0.
Almost Sure Recurrence of the Simple Random Walk Path
Thus, this is an L1 (P)-martingale relative to the filtration {S−n}n≥0 and by the martingale convergence theorem it converges in L1 (P) to a limit f .
Ballistic Random Walk in a Random Environment with a Forbidden Direction
For the quenched mean process n−1/2{E ω 0 (X[nt] ) − ntv} we show that the process Zn is close to a martingale under P, and apply the martingale invariance principle again.
Ballistic Random Walk in a Random Environment with a Forbidden Direction
Eq. (1.6) defines in both cases the positive operator-valued process Rt = φt (I ) as a sub-martingale with R0 = I , or a martingale in the case K + K † = L−L+ .
Quantum Stochastic Positive Evolutions: Characterization, Construction, Dilation
The sub-filtering condition K + K † ≤ L−L+ for the equation (2.6) defines in both cases the positive operator-valued process Rt = φt (I ) as a sub-martingale with R0 = I , or a martingale in the case K + K † = L−L+ .
On the Generators of Quantum Stochastic Master Equation
The sub-filtering condition K + K † ≤ L−L+ for the equation (1.6) defines in both cases the positive operator-valued process Rt = φt (I ) as a sub-martingale with R0 = I , or a martingale in the case K + K † = L−L+ .
On the General Form of Quantum Stochastic Evolution Equation
***