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Featured content represents the best of what Wikipedia has to offer. These are the articles, pictures, and other contributions that showcase the polished result of the collaborative efforts that drive Wikipedia. All featured content undergoes a thorough review process to ensure that it meets the highest standards and can serve as an example of our end goals. A small bronze star () in the top right corner of a page indicates that the content is featured.

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Featured article: April 15, 2007

In mathematics, 1 − 2 + 3 − 4 + · · · is the infinite series whose terms are the successive positive integers, given alternating signs. The series diverges, meaning that its sequence of partial sums (1, −1, 2, −2, …) does not tend towards any finite limit. Nonetheless, Leonhard Euler claimed that 1 − 2 + 3 − 4 + · · · = ¹⁄₄. Starting in 1890, Ernesto Cesàro, Émile Borel, and others investigated well-defined methods to assign generalized sums to divergent series – including new interpretations of Euler's attempts. Many of these summability methods assign to 1 − 2 + 3 − 4 + · · · a "sum" of ¹⁄₄ after all. Cesàro summation is one of the few methods that does not sum 1 − 2 + 3 − 4 + · · ·, so the series is an example where a slightly stronger method, such as Abel summation, is required. The series 1 − 2 + 3 − 4 + · · · is closely related to Grandi's series 1 − 1 + 1 − 1 + · · ·. Euler treated these two as special cases of 1 − 2ⁿ + 3ⁿ − 4ⁿ + · · · for arbitrary n, a line of research extending his work on the Basel problem and leading towards the functional equations of what we now know as the Dirichlet eta function and the Riemann zeta function. (more...)

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Featured picture: June 5, 2007

Two views of a Renard bassoon, a woodwind instrument in the double reed family that plays in the tenor range and below. The instrument is made of black maple, with silver-plated nickel silver keys.

The bassoon evolved from the dulcian. Although the process of evolution from its predecessor is unknown, the bassoon much as it appears in its current form appeared in a late 17th century painting, and a three-keyed bassoon has been dated to 1699. The modern bassoon exists in two distinct primary forms, the Buffet system and the Heckel system. The Buffet system is played primarily in France but also in Belgium and parts of Latin America, while the Heckel system is played in the majority of the world.

Photo credit: Gregory Maxwell

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Featured list: List of Colorado Avalanche players

This is a complete list of ice hockey players who have played for the Colorado Avalanche in the National Hockey League (NHL). It includes players that have played at least one match, either in the NHL regular season or in the NHL playoffs. The Colorado Avalanche franchise was originally founded in Quebec, Canada with the name Quebec Nordiques. In 1995, the franchise moved to Denver, Colorado and since then 12 goaltenders and 141 skaters have wore its jersey. The Avalanche have won the Stanley Cup twice with a total of 41 players. Six of them were part of both Stanley Cup winning rosters.

Goaltenders

Patrick Roy, goalie for the Avalanche between 1995 and 2003 and two-time Stanley Cup winner

	Nat	Seasons	Regular Season					Playoffs					SC winner
	Nat	Seasons	GP	W	P	GAA	SV%	GP	W	P	GAA	SV%	SC winner
Aebischer, David		2000-2006	174	89	5	2.35	.917	13	6	0	2.07	.928	2001
Billington, Craig		1996-1999	67	30	2	2.61	.912	3	0	0	4.00	.905
Budaj, Peter		2005-2007	91	45	3	2.75	.903	3	0	0	4.00	.905
Denis, Marc		1996-2000	28	10	2	2.55	.922	—	—	—	—	—

Skaters

	Nat	Pos	Seasons	Regular Season					Playoffs					SC winner
	Nat	Pos	Seasons	GP	G	A	P	PIM	GP	G	A	P	PIM	SC winner
Andreychuk, Dave		LW	1999-2000	14	1	2	3	2	17	3	2	5	18
Arnason, Tyler		C	2006-2007	82	16	33	49	26	—	—	—	—	—
Aubin, Serge		C	1998-2000 2002-2003	82	6	7	13	70	22	0	1	1	10
Babenko, Yuri		C	2000-2001	3	0	0	0	0	—	—	—	—	—

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Featured topic: Christ Illusion

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Christ Illusion *

"Eyes of the Insane"

"Jihad"

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Featured content procedures

	Articles	Pictures	Lists	Portals	Topics	Sounds
Featured:	1535 / T	FP / T	FL / T	FPO / T	FT / T	FS / T
Criteria:	FA? / T	FP? / T	FL? / T	FPO? / T	FT? / T	FS? / T
Candidates:	FAC / T	FPC / T	FLC / T	FPOC / T	FTC / T	FSC / T
Removal:	FARC / T	FPIRC / T	FLRC / T	FPRC	FTRC / T	FSRC / T
Former:	442 / T	FFP	FFL / T	FFPO	FFT	FFS