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Athens Olympic Sports Complex

The Athens Olympic Park, is a sport facilities complex located at Marousi, northeast Athens, Greece. The complex consists of five major venues as well as other supplementary sport facilities; the Olympic Athletic Center of Athens has hosted the Mediterranean Games in 1991, the World Championship in Athletics in 1997 as well as other important athletic and cultural events. The most significant event the Athens Olympic Sports Complex has hosted, was the Olympic Games. OACA was the main venue for the Athens Olympic Games in 2004; the complex was revamped for the games under a design produced by the Spanish architect Santiago Calatrava. The stadium, built in 1982 and extensively refurbished for the games in 2004, including the addition of a roof, hosted the athletics events and the soccer final, as well as the Opening Ceremony on August 13, 2004 and the Closing Ceremony on August 29, 2004, it is used as the home ground of AEK Athens F. C. one of the biggest football clubs in Greece. The Nikos Galis Olympic Indoor Hall was completed in 1995, was the largest indoor venue in use for sporting events at the 2004 Summer Olympics in Athens, Greece.

It is part of the Athens Olympic Sports Complex, in the suburb of Maroussi. The arena was used for artistic gymnastics and trampolining and hosted the finals of the basketball matches at the games. On May 18 and 20, 2006, the Olympic Indoor Hall hosted the 51st Eurovision Song Contest, held in Athens after Greece's victory at the Song Contest in 2005; the Athens Olympic Sports Complex can be reached by Metro, by suburban train, or by direct bus lines [A7, 602, 550. While it was reported in 2008 that all of the Olympic venues utilized for the 2004 games, including certain facilities in the Sports Complex such as the velodrome and tennis center, have fallen into varying states of dereliction or disrepair, all of the facilities in the Athens Olympic Sports Complex are still in use today; the table below illustrates how the Athens Olympic Sports Complex facilities are used today: 2004 Summer Olympics official report. Volume 2. Pp. 201, 207, 227, 231, 242, 273, 303, 324, 329, 346, 409. Media related to Athens Olympic Sports Complex at Wikimedia Commons Official site Olympic Indoor hall info and pictures at stadia.gr

Edwin

The name Edwin means "rich friend". It comes from the Old English elements "ead" and "wine"; the original Anglo-Saxon form is Eadwine, found for Anglo-Saxon figures. Edwin may refer to: Edwin of Northumbria, King of Northumbria and Christian saint Edwin, son of Edward the Elder Eadwine of Sussex, King of Sussex Eadwine of Abingdon, Abbot of Abingdon Edwin, Earl of Mercia, brother-in-law of Harold Godwinson Edwin, Canadian musician Edwin Austin Abbey British artist Edwin Eugene Aldrin, better known as Buzz Aldrin, American astronaut Edwin Howard Armstrong, American inventor Edwin Biedermann, British real tennis player Edwin Booth, Shakespearean actor Edwin Bramall, Chief of the Defence Staff of the British Armed Forces Edwin Cassiani, Colombian boxer Edwin Centeno, Peruvian race walker Edwin Chadwick British social reformer Edwin L. Cox, American oilman and philanthropist from Dallas, Texas Edwin Davies, British businessman and philanthropist Edwin L. Elwood, American soldier Edwin Encarnación, Dominican baseball player Edwin Escobar, Venezuelan professional baseball player Edwin E. Floyd, American mathematician Edwin M. Gardner, American painter Edwin Haslam, physical organic chemist and an author of books on polyphenols Edwin N. Hubbell, American politician Edwin Hubble, American astronomer for whom the Hubble Telescope is named Edwin Jackson, American baseball player Edwin R. Keedy, American Dean of the University of Pennsylvania Law School Sir Edwin Landseer Lutyens, British architect Edwin McCain, American musician Edwin Meese, American Attorney General Edwin Moses, American track and field athlete Edwin Mosquera, Colombian weightlifter Edwin Newman, American newscaster and journalist Edwin Orozco, Colombian road cyclist Edwin Alfred Rickards, British architect Edwin Sandys, Archbishop of York Edwin Spanier, American mathematician Edwin Starr, American soul music singer Edwin Thomas, multiple people Edwin van der Sar, Dutch football player Edwin Vurens, Dutch football player Edwin Wijeyeratne, Sri Lankan cabinet minister Edwin Jarvis, Marvel Comics supporting character Aun, mythical Swedish king Edwin Drood, main character in The Mystery of Edwin Drood, final unfinished novel of Charles Dickens Eadwine Psalter illuminated manuscript Edwina, the feminine form Isiah Edwin Leopold, known as Ed Wynn, 20th-century American comic

Operator-precedence parser

In computer science, an operator precedence parser is a bottom-up parser that interprets an operator-precedence grammar. For example, most calculators use operator precedence parsers to convert from the human-readable infix notation relying on order of operations to a format, optimized for evaluation such as Reverse Polish notation. Edsger Dijkstra's shunting yard algorithm is used to implement operator precedence parsers. Other algorithms include the top down operator precedence method. An operator-precedence parser is a simple shift-reduce parser, capable of parsing a subset of LR grammars. More the operator-precedence parser can parse all LR grammars where two consecutive nonterminals and epsilon never appear in the right-hand side of any rule. Operator-precedence parsers are not used in practice. First, they are simple enough to write by hand, not the case with more sophisticated right shift-reduce parsers. Second, they can be written to consult an operator table at run time, which makes them suitable for languages that can add to or change their operators while parsing.

Raku sandwiches an operator-precedence parser between two recursive descent parsers in order to achieve a balance of speed and dynamism. This is expressed in the virtual machine for Parrot, as the Parser Grammar Engine. GCC's C and C++ parsers, which are hand-coded recursive descent parsers, are both sped up by an operator-precedence parser that can examine arithmetic expressions. Operator precedence parsers are embedded within compiler compiler-generated parsers to noticeably speed up the recursive descent approach to expression parsing; the precedence climbing method is a compact and flexible algorithm for parsing expressions, first described by Martin Richards and Colin Whitby-Strevens. An infix-notation expression grammar in EBNF format will look like this: With many levels of precedence, implementing this grammar with a predictive recursive-descent parser can become inefficient. Parsing a number, for example, can require five function calls: one for each non-terminal in the grammar until reaching primary.

An operator-precedence parser can do the same more efficiently. The idea is that we can left associate the arithmetic operations as long as we find operators with the same precedence, but we have to save a temporary result to evaluate higher precedence operators; the algorithm, presented here does not need an explicit stack. The algorithm is not a pure operator-precedence parser like the Dijkstra shunting yard algorithm, it assumes that the primary nonterminal is parsed in a separate subroutine, like in a recursive descent parser. The pseudocode for the algorithm is; the parser starts at function parse_expression. Precedence levels are greater than or equal to 0. Parse_expression return parse_expression_1 parse_expression_1 lookahead:= peek next token while lookahead is a binary operator whose precedence is >= min_precedence op:= lookahead advance to next token rhs:= parse_primary lookahead:= peek next token while lookahead is a binary operator whose precedence is greater than op's, or a right-associative operator whose precedence is equal to op's rhs:= parse_expression_1 lookahead:= peek next token lhs:= the result of applying op with operands lhs and rhs return lhs Note that in the case of a production rule like this: the algorithm must be modified to accept only binary operators whose precedence is > min_precedence.

An example execution on the expression 2 + 3 * 4 + 5 == 19 is. We give precedence 0 to equality expressions, 1 to additive expressions, 2 to multiplicative expressions. Parse_expression_1 the lookahead token is +, with precedence 1; the outer while loop is entered. Op is + and the input is advanced rhs is 3 the lookahead token is *, with precedence 2; the inner while loop is entered.parse_expression_1 the lookahead token is *, with precedence 2. The outer while loop is entered.op is * and the input is advanced rhs is 4 the next token is +, with precedence 1. The inner while loop is not entered. Lhs is assigned 3*4 = 12 the next token is +, with precedence 1; the outer while loop is left.12 is returned.the lookahead token is +, with precedence 1. The inner while loop is not entered. Lhs is assigned 2+12 = 14 the lookahead token is +, with precedence 1; the outer while loop is not left. Op is + and the input is advanced rhs is 5 the next token is ==, with precedence 0; the inner while loop is not entered.

Lhs is assigned 14+5 = 19 the next token is ==, with precedence 0. The outer while loop is not left. Op is == and the input is advanced rhs is 19 the next token is end-of-line, not an operator; the inner while loop is not entered. Lhs is assigned the result of evaluating 19 == 19, for example 1; the next token is end-of-line, not an operator. The outer while loop is left.1. There are other ways to apply operator precedence rules. One is to build a tree of the original expression and apply tree rewrite rules to it. Su