| 1987 European Athletics Indoor Championships | ||
|---|---|---|
 | ||
| Track events | ||
| 60 m | men | women |
| 200 m | men | women |
| 400 m | men | women |
| 800 m | men | women |
| 1500 m | men | women |
| 3000 m | men | women |
| 60 m hurdles | men | women |
| 3000 m walk | women | |
| 5000 m walk | men | |
| Field events | ||
| High jump | men | women |
| Pole vault | men | |
| Long jump | men | women |
| Triple jump | men | |
| Shot put | men | women |
The women's 400 metres event at the 1987 European Athletics Indoor Championships was held on 21 and 22 February. [1]
| Gold | Silver | Bronze |
Mariya Pinigina  Soviet Union | Gisela Kinzel  West Germany | Cristina Pérez  Spain |
First 2 from each heat (Q) and the next 2 fastest (q) qualified for the final.
| Rank | Heat | Name | Nationality | Time | Notes |
|---|---|---|---|---|---|
| 1 | 1 | Mariya Pinigina | Soviet Union | 52.09 | Q |
| 2 | 1 | Helga Arendt | West Germany | 52.61 | Q |
| 3 | 1 | Judit Forgács |  Hungary | 52.61 | q, NR |
| 4 | 2 | Gisela Kinzel | West Germany | 52.76 | Q |
| 5 | 2 | Marzena Wojdecka |  Poland | 52.77 | Q, NR |
| 6 | 1 | Cristina Pérez | Spain | 52.83 | q, NR |
| 7 | 2 | Rositsa Stamenova |  Bulgaria | 53.18 | |
| 8 | 1 | Fabienne Ficher |  France | 53.86 | |
| 9 | 2 | Gerda Haas |  Austria | 53.89 | NR |
| 10 | 2 | Nathalie Simon | France | 54.22 | |
| 11 | 1 | Semra Aksu |  Turkey | 55.17 | |
| 2 | Ann-Louise Skoglund |  Sweden | DNS |
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
 | Mariya Pinigina | Soviet Union | 51.27 | |
 | Gisela Kinzel | West Germany | 52.29 | |
 | Cristina Pérez | Spain | 52.63 | NR |
| 4 | Helga Arendt | West Germany | 52.64 | |
| 5 | Judit Forgács | Hungary | 52.87 | |
| 6 | Marzena Wojdecka | Poland | 52.97 |
Propositional calculus is a branch of logic. It is also called propositional logic, statement logic, sentential calculus, sentential logic, or sometimes zeroth-order logic. It deals with propositions and relations between propositions, including the construction of arguments based on them. Compound propositions are formed by connecting propositions by logical connectives. Propositions that contain no logical connectives are called atomic propositions.
Q, or q, is the 17th letter of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is pronounced, most commonly spelled cue, but also kew, kue and que.
In geometry a quadrilateral is a four-sided polygon, having four edges (sides) and four corners (vertices). The word is derived from the Latin words quadri, a variant of four, and latus, meaning "side". It is also called a tetragon, derived from Greek "tetra" meaning "four" and "gon" meaning "corner" or "angle", in analogy to other polygons. Since "gon" means "angle", it is analogously called a quadrangle, or 4-angle. A quadrilateral with vertices , , and is sometimes denoted as .
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An electric field is the physical field that surrounds electrically charged particles. Charged particles exert attractive forces on each other when their charges are opposite, and repulsion forces on each other when their charges are the same. Because these forces are exerted mutually, 2 charges must be present for the forces to take place. The electric field of a single charge describes their capacity to exert such forces on another charged object. These forces are described by Coulomb's Law, which says that the greater the magnitude of the charges, the greater the force, and the greater the distance between them, the weaker the force. Thus, we may informally say that the greater the charge of an object, the stronger its electric field. Similarly, the electric field is stronger nearer charged objects and weaker further away. Electric fields originate from electric charges and time-varying electric currents. Electric fields and magnetic fields are both manifestations of the electromagnetic field, one of the four fundamental forces of nature.
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Noether's theorem states that every continuous symmetry of the action of a physical system with conservative forces has a corresponding conservation law. This is the first of two theorems proven by mathematician Emmy Noether in 1915 and published in 1918. The action of a physical system is the integral over time of a Lagrangian function, from which the system's behavior can be determined by the principle of least action. This theorem only applies to continuous and smooth symmetries of physical space.
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