AC/DC

AC/DC are an Australian hard rock band, formed in November 1973 by brothers Malcolm and Angus Young, who continued as members until Malcolm's illness and departure in 2014. Commonly referred to as a hard rock or blues rock band, they are also considered pioneers of heavy metal and are sometimes classified as such, though they have always dubbed their music as simply "rock and roll".

AC/DC underwent several line-up changes before releasing their first album, High Voltage, on 17 February 1975; Malcolm and Angus were the only original members left in the band. Membership subsequently stabilised until bassist Mark Evans was replaced by Cliff Williams in 1977 for the album Powerage. Within months of recording the album Highway to Hell, lead singer and co-songwriter Bon Scott died on 19 February 1980 after a night of heavy alcohol consumption. The group considered disbanding, but buoyed by support from Scott's parents, decided to continue and set about finding a new vocalist. Ex-Geordie singer Brian Johnson was auditioned and selected to replace Scott. Later that year, the band released the new album, Back in Black, which was made as a tribute to Bon Scott. The album launched them to new heights of success and became their all-time best-seller.

Category

Category, plural categories, may refer to:

Philosophy and general uses

Mathematics

Linguistics

Lusternik–Schnirelmann category

In mathematics, the Lyusternik–Schnirelmann category (or, Lusternik–Schnirelmann category, LS-category) of a topological space is the homotopical invariant defined to be the smallest integer number such that there is an open covering of with the property that each inclusion map is nullhomotopic. For example, if is the circle, this takes the value two.

Sometimes a different normalization of the invariant is adopted, which is one less than the definition above Such a normalization has been adopted in the definitive monograph by Cornea, Lupton, Oprea, and Tanré (see below).

In general it is not easy to compute this invariant, which was initially introduced by Lazar Lyusternik and Lev Schnirelmann in connection with variational problems. It has a close connection with algebraic topology, in particular cup-length. In the modern normalization, the cup-length is a lower bound for LS category.

It was, as originally defined for the case of X a manifold, the lower bound for the number of critical points that a real-valued function on X could possess (this should be compared with the result in Morse theory that shows that the sum of the Betti numbers is a lower bound for the number of critical points of a Morse function).

Higher category theory

In mathematics, higher category theory is the part of category theory at a higher order, which means that some equalities are replaced by explicit arrows in order to be able to explicitly study the structure behind those equalities.

Strict higher categories

An ordinary category has objects and morphisms. A 2-category generalizes this by also including 2-morphisms between the 1-morphisms. Continuing this up to n-morphisms between (n-1)-morphisms gives an n-category.

Just as the category known as Cat, which is the category of small categories and functors is actually a 2-category with natural transformations as its 2-morphisms, the category n-Cat of (small) n-categories is actually an n+1-category.

An n-category is defined by induction on n by:

So a 1-category is just a (locally small) category.

The monoidal structure of Set is the one given by the cartesian product as tensor and a singleton as unit. In fact any category with finite products can be given a monoidal structure. The recursive construction of n-Cat works fine because if a category C has finite products, the category of C-enriched categories has finite products too.

Songs (Deptford Goth album)

Songs is an album by Deptford Goth.

Track listing

References

Kate Micucci

Kate Micucci (pronounced /mᵻˈkuːtʃi/; born March 31, 1980) is an American actress, comedian, singer-songwriter, and artist. She is one half of the musical comedy duo Garfunkel and Oates. Her first major television exposure was her role as Stephanie Gooch in Scrubs. Later she portrayed Shelley in Raising Hope and Raj's girlfriend, Lucy in The Big Bang Theory. She also provides the voice of Velma Dinkley in Be Cool, Scooby-Doo!, and Sadie in Steven Universe.

Early life

Born in Jersey City, New Jersey, of Italian ancestry, Micucci was raised in Nazareth, Pennsylvania, in the Lehigh Valley region of the state, where she first learned to play classical piano, taught by her mother. She graduated alongside rock musician Jordan White in 1998 from Nazareth Area High School. Micucci then received an A.A. in Fine Arts from Keystone College in La Plume, Pennsylvania, and a B.A. in Studio Art in 2003 from Loyola Marymount University, Los Angeles.

Career

Micucci's TV credits include numerous television commercials, as well as Toni the barista on NBC's Four Kings, guest roles on Malcolm in the Middle, 'Til Death, How I Met Your Mother, Cory in the House, and Campus Ladies, and recurring roles on Scrubs and Raising Hope. Her film credits include The Last Hurrah, Bart Got a Room and When in Rome. She plays "Lily the IT girl" on Elevator produced by HBO's Runawaybox. In early 2009, she released a five-track EP entitled Songs.

Songs (Regina Spektor album)

Songs is the second album by singer-songwriter Regina Spektor. The album was recorded in its entirety on Christmas Day of 2001; all songs were recorded in one take. Copies of the self-released album were sold at Spektor's early live shows. The album is still sold at shows, and is available for purchase periodically at the independent CD retailer CDBaby.com.

Track listing

All songs written and composed by Regina Spektor. 

Personnel

Notes

Songs, recorded on December 25, 2001. Times Square was cold, quiet, abandoned. Joe Mendelson and I were going to archive a list of songs. We recorded seventeen—here are twelve of them. When you are listening to this little disk, try to think that you are in on a secret...