| 1990 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 | women |
| Shot put | men | women |
The women's 400 metres event at the 1990 European Athletics Indoor Championships was held in Kelvin Hall on 3 and 4 March. [1]
| Gold | Silver | Bronze |
Marina Shmonina  Soviet Union | Iolanda Oanță  Romania | Judit Forgács  Hungary |
The winner of each heat (Q) and the next 2 fastest (q) qualified for the final.
| Rank | Heat | Name | Nationality | Time | Notes |
|---|---|---|---|---|---|
| 1 | 3 | Marina Shmonina | Soviet Union | 52.53 | Q |
| 2 | 1 | Sally Gunnell |  Great Britain | 52.92 | Q |
| 3 | 1 | Iolanda Oanță | Romania | 53.27 | q |
| 4 | 1 | Judit Forgács | Hungary | 53.30 | q |
| 5 | 3 | Linda Kisabaka |  West Germany | 53.41 | |
| 6 | 3 | Linda Keough | Great Britain | 53.74 | |
| 7 | 2 | Angela Piggford | Great Britain | 54.01 | Q |
| 8 | 2 | Noémi Bátori | Hungary | 54.35 | |
| 9 | 1 | Cristina Pérez |  Spain | 54.53 | |
| 10 | 2 | Irmgard Trojer |  Italy | 54.90 | |
| 11 | 2 | Marina Vasarmidou |  Greece | 55.38 | |
| 3 | Anita Protti |  Switzerland | DNS |
| Rank | Lane | Name | Nationality | Time | Notes |
|---|---|---|---|---|---|
 | 2 | Marina Shmonina | Soviet Union | 51.22 | |
 | 1 | Iolanda Oanță | Romania | 52.22 | |
 | 4 | Judit Forgács | Hungary | 53.02 | |
| 4 | 3 | Sally Gunnell | Great Britain | 53.38 | |
| 5 | 5 | Angela Piggford | Great Britain | 53.82 |
In logic and related fields such as mathematics and philosophy, "if and only if" is a biconditional logical connective between statements, where either both statements are true or both are false. The connective is biconditional, and can be likened to the standard material conditional combined with its reverse ("if"); hence the name. The result is that the truth of either one of the connected statements requires the truth of the other, though it is controversial whether the connective thus defined is properly rendered by the English "if and only if"—with its pre-existing meaning. For example, P if and only if Q means that P is true whenever Q is true, and the only case in which P is true is if Q is also true, whereas in the case of P if Q, there could be other scenarios where P is true and Q is false.
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