Walsh may refer to:

People and fictional characters

Walsh (surname) Walsh is a common Irish surname, meaning "Briton" or "foreigner", literally "Welshman" or "Wales", taken to Ireland by soldiers from Britain, namely Cambro-Norman/Welsh, Cornish and Cumbrian soldiers during and after the Norman invasion of Ir ...

, including a list of people and fictional characters with the surname

Places

Fort Walsh Fort Walsh is a National Historic Site of Canada that was a North-West Mounted Police (NWMP) fort and the site of the Cypress Hills Massacre. Administered by Parks Canada, it forms a constituent part of Cypress Hills Interprovincial Park. The fo ...

, one of the first posts of the Royal Canadian Mounted Police *

Walsh, Ontario Walsh (formerly known as Charlotteville Centre) is a medium-sized hamlet in Norfolk County, Ontario, Canada. Summary Walsh developed as a township central crossroads gathering point on Young's Creek, in the first quarter of the 19th century. A ...

, Norfolk County, Ontario, Canada *

Walsh, Colorado Walsh is a Statutory Town in Baca County, Colorado, United States. The population was 546 at the 2010 census, down from 723 at the 2000 census. A post office called Walsh has been in operation since 1926. The community was named after one ...

, USA * Walsh, Michigan, USA *

Walsh, Wisconsin Walsh is an Unincorporated area, unincorporated community located in the town of Porterfield, Wisconsin, Porterfield, in Marinette County, Wisconsin, United States. Geography Walsh is located along County Trunk Highway G at the intersection with ...

, USA *

Walsh County, North Dakota Walsh County is a county in the U.S. state of North Dakota. As of the 2020 census, the population was 10,563. Its county seat is Grafton. History The Dakota Territory legislature created the county on May 2, 1881, with areas partitioned from ...

, USA *

Walsh, Alberta Walsh is a hamlet in Alberta, Canada within Cypress County. It is located along the Trans-Canada Highway, immediately west of the Saskatchewan border, and has an elevation of . The hamlet is located in Census Division No. 1 and in the federal ...

, a hamlet in Canada * Walsh Lake (Lac-Jacques-Cartier), Canada *

Mount Walsh National Park Mount Walsh is a national park in Queensland, Australia, northwest of Brisbane. A prominent landmark in the Biggenden region is the granite bluff area of Mount Walsh which rises to above sea level in the northern part of park. The summit has ...

, Australia

Schools

Walsh University Walsh University is a private Roman Catholic university in North Canton, Ohio. It enrolls approximately 2,700 students and was founded in 1960 by the Brothers of Christian Instruction as a liberal arts college. Walsh College became Walsh Univ ...

, North Canton, Ohio *

Walsh College Walsh College is a private college focused on business education with its main campus in Troy, Michigan. It was founded in 1922. History The college began with the founding of the Walsh Institute of Accountancy and the introduction of the Pac ...

, Troy, Michigan *

Walsh School of Foreign Service The Edmund A. Walsh School of Foreign Service (SFS) is the school of international relations at Georgetown University in Washington, D.C. It is considered to be one of the world's leading international affairs schools, granting degrees at bot ...

, Washington, D.C. *

Walsh Jesuit High School Walsh Jesuit High School is a private, Catholic, co-educational college preparatory high school located in Cuyahoga Falls, Ohio, approximately 30 miles south of Cleveland. Walsh Jesuit is reputed to be one of Ohio's leading college preparatory s ...

, Cuyahoga Falls, Ohio

Ships

* USS ''Walsh'' (APD-111), a United States Navy high-speed transport in commission from 1945 to 1946, originally intended to be a destroyer escort

Mathematics

Walsh function In mathematics, more specifically in harmonic analysis, Walsh functions form a complete orthogonal set of functions that can be used to represent any discrete function—just like trigonometric functions can be used to represent any continuous ...

, an orthogonal basis of the square-integrable functions on the unit interval *

Walsh matrix In mathematics, a Walsh matrix is a specific square matrix of dimensions 2, where ''n'' is some particular natural number. The entries of the matrix are either +1 or −1 and its rows as well as columns are orthogonal, i.e. dot product i ...

, an orthogonal matrix with several useful properties *

Walsh transform The Hadamard transform (also known as the Walsh–Hadamard transform, Hadamard–Rademacher–Walsh transform, Walsh transform, or Walsh–Fourier transform) is an example of a generalized class of Fourier transforms. It performs an orthogonal ...

, a linear transform based on the Walsh matrix

Other

Walsh convention :''See the Glossary of contract bridge terms for an explanation of unfamiliar words or phrases.'' Walsh is a convention used in the card game of bridge in response to an opening bid of 1. The convention has its origins in the Walsh System develope ...