Erdal İnönü, (Date of birth 6 June 1926, Ankara - Date of death October 31, 2007, Houston), Turkish physicist, scientist and politician. President of the Republic of Turkey Ismet Inonu's second son.
Between May 16 and June 25, 1993, he acted as Prime Minister for approximately 1,5 months. He served as the Deputy Prime Minister between 1991-1993. He served as the Chairman of the Social Democracy Party (SODEP) from 1986 to 1993.
İnönü left all his teaching and management positions in 1983 after political activity was re-released after the September 12 coup, and in June of the same year, he was among the founding members of SODEP and became the first Chairman of the party. Although his founding membership was vetoed by the National Security Council, he was re-elected as the President of SODEP in December 1983. In the 1984 Local Elections, his party took the second place with 23.4% of the vote. In 1985, after the merger of SODEP with the Populist Party under the name of the Social Democratic People's Party (SHP), he became the party's chairman in 1986. Party deputy midterm elections in Turkey in 1986 22.6% of the vote fell to 3rd place, İzmir İnönü entered parliament as MP.
SHP Turkey after 1991 general elections, the True Path Party General Chairman Suleyman Demirel made the (TPP) has set up a coalition government and has been the Deputy Prime Minister İnönü. President Demirel of Turkey in 1993 began Selecting prime minister in the presidential selection. When Tansu Çiller was elected as the Chairman of DYP and the government formed, İnönü assumed the post of Deputy Prime Minister. He served as the Minister of Foreign Affairs until he left active politics in 1995.
Erdal İnönü was born in Ankara on June 6, 1926 as the middle of three children of İsmet and Mevhibe İnönü (Ömer and Özden). He completed his primary, secondary and high school education in Ankara. After graduating from Ankara Gazi High School in 1943 and from Ankara University Faculty of Science in 1947, he went to the USA. He received his master's (1948) and doctorate (1951) degrees in physics from the California Institute of Technology (Caltech). He returned to Turkey in 1952 after doing research at Princeton University for a while. He became an associate professor in 1955 at Ankara University Faculty of Science, where he entered as an assistant. In 1957, Sevinç (Sohtorik) married İnönü. He was visiting researcher at Princeton University and at the Oak Ridge Princeton National Laboratory between 1958 and 60. He then entered Middle East Technical University (METU) as a professor of theoretical physics.
He served as the head of the theoretical physics department at METU (1960-64) and as the Dean of the Faculty of Arts and Sciences (1965-68). He went to the USA in 1968 and taught at Princeton and Columbia Universities for a year as a visiting professor. He returned home in 1969 and was elected as the Vice Rector of METU and in 1970 as the Rector. He left the Rectorate in March 1971 and continued his teaching and research duties. He won the TUBITAK Science Award in the field of physics in 1974.  He worked as a visiting researcher at Princeton University for six months that same year. He transferred to Boğaziçi University in 1975. A year later, he was appointed as the Dean of the Faculty of Basic Sciences of the same university. Six years after this mission in 1982, Turkey's Scientific and Technological Research (TUBITAK) Basic Science Research Institute was established in Istanbul (Feza Gürsey Institute) was appointed to the Directorate.
In May 1983, when political activities were released after the September 12 coup, he resigned from all teaching and managerial positions and on June 6, 1983, he entered the political life as the founding member and first Chairman of the Social Democracy Party (SODEP). Although his founding membership was vetoed by the National Security Council in June 1983, he was re-elected as the Chairman of SODEP in December 1983.
He played a constructive role in the merger of SODEP and the People's Party (HP). After the merger of SODEP with the Populist Party and the Social Democratic People's Party (SHP) on November 2-3, 1985, it left the SHP Chairmanship to the People's Party Chairperson Aydın Güven Gürkan until the party's first general assembly. He was appointed Chairman of the General Assembly in June 1986. September 28, 1986 in the midterm elections from Izmir Turkey Grand National Assembly (Parliament) elected. He was once again elected as the SHP Chairman in the SHP convention in June 1987, and as the Izmir deputy for the second time in the early general elections on 30 November 1987.
The SHP, led by İnönü, gained 1989 percent of the votes in the 28.7 local elections, when the ruling Motherland Party (ANAP) was severely defeated; SHP acquired 67 of the mayorships in 39 provincial centers, primarily in Istanbul, Ankara and Izmir.
İnönü won the congresses (against İsmail Cem in June 1988, against Baykal in December 1989, September 1990 and January 1992) against the opposition group led by Deniz Baykal, İsmail Cem and Ertuğrul Günay. continued his duty.
When the SHP, which was able to collect 1991 percent of the votes in the early general elections in November 20, became the third party, the internal opposition placed the responsibility for the lost votes on İnönü administration. However, the establishment of a coalition government with the SHP by the True Path Party, which came out as the first party in the elections, strengthened the position of İnönü, who was the Deputy Prime Minister in the government.
Eighteen of the People's Labor Party (HEP) candidates who participated in the elections from the SHP lists in the same elections were elected as MPs. Erdal İnönü had to demand the resignation of two deputies from the party after the oath crisis in the Turkish Grand National Assembly caused by HEP-origin Leyla Zana and Hatip Dicle. Upon this, the HEP-origin MPs who left the SHP formed the Democracy Party (DEP).
Deniz Baykal, who once again defeated İnönü at the 25th Extraordinary Congress on 26-1992 January 7 and lost their hopes of taking over the party administration, and the opposition group “Yeni Sol” left the SHP and formed the Republican People's Party (CHP). re-established (September 1992).
After the sudden death of President Turgut Özal and the subsequent election of Süleyman Demirel to the Presidency, he acted as Prime Minister for approximately 1,5 months. Before the DYP congress held on 12-13 June 1993, he announced on June 6, with a surprise decision, that the SHP, like DYP, should change its leader, and that his party would not be a candidate in the first congress. Ankara Metropolitan Municipality Mayor Murat Karayalçın was elected as the Chairman at the SHP 11th Ordinary Congress held on 12-1993 September 4.
He was elected as the "Honorary Chairman" of the CHP at the convention where the SHP and CHP merged on 18-19 February 1995. Immediately after the convention, he became the Minister of Foreign Affairs in the appointments made in the CHP wing of the DYP-CHP Coalition Government. In October 1995, he left both his role in the coalition and active politics. In April 2001, he resigned from the CHP by reacting to some practices of the then CHP leader Deniz Baykal. In his last years, he did not return to active politics, despite all the insistence made by social democratic circles.
İnönü, who was elected as a deputy three times, served as a deputy for İzmir in the 17th (by-elections), 18th and 19th terms. He served as the Vice President of the Socialist International (1992-2001).
Erdal İnönü, who is a member of TÜBİTAK Science Board, Atomic Energy Commission, UNESCO Executive Council and the Presidency of the Turkish Physical Society, has important works in the field of physics. The most important of his researches, which are also featured in international scientific journals, was his joint work with Hungarian-American atomic physicist Eugene Wigner at Princeton University in 1951. This study titled “On the reduction and representation of groups” has become a general method in group theory and has become one of the basic methods of mathematical physics. His work (1951), known as “İnönü-Wigner Group Reduction”, is accepted as one of the basic concepts of modern mathematical physics.
Erdal Inonu, Turkey Scientific and Technical Research Institution (TUBITAK) has contributed to the organization and TUBITAK task was the founding director of the Institute of Fundamental Research. İnönü, who received the Wigner Medal, the most important award after Nobel in the field of physics in 2004, became the second Turk to receive this award after Feza Gürsey. İnönü also known by the scientific studies on the Republic of Turkey and the Ottoman Empire.
He worked at Sabancı University and TÜBİTAK Feza Gürsey Institute from 2002 until his treatment started.
Erdal İnönü, who was diagnosed with blood cancer in April 2006, was treated in the United States for a while. After a successful initial treatment Inonu returned to Turkey in August 20, 2007 due to pneumonia diagnosed with cancer was removed to the hospital. As a result of the tests, it was determined that the leukemia disease, which was taken under control in the first treatment period, reappeared and was taken to the USA again.
On October 31, 2007, he died at the age of 81 in the hospital where he was treated for blood cancer. His funeral was brought to Ankara on a Turkish Airlines scheduled flight on Friday, November 2. A funeral was held on 3 November 2007 at 11.00:4 in the Turkish Grand National Assembly. The funeral spent the night at Gulhane Military Medical Academy GATA. After the state ceremony, İnönü's body was brought to the garden of the Pink Villa where he was born, and a ceremony was held here. The funeral of İnönü, who was later taken to Istanbul at the request of his wife Sevinç İnönü, was buried in the family cemetery in Zincirlikuyu Cemetery, following the funeral prayer at Teşvikiye Mosque on Sunday, November XNUMX.
Erdal İnönü's main scientific works;
- Turkey Period 1923-1966 Contribution to Research in the Department of Physics Demonstrating a bibliography and Some Observations (1971)
- Bibliography of Mathematics Studies in the 1923-1966 Period and Some Observations (1973)
- Group Theoretical Methods in Physics (1983; with Meral Serdaroğlu)
Other works of Erdal İnönü;
- Mehmet Nadir, An Education and Science Pioneer (1997)
- Memories and Thoughts Volume 1 (1996)
- Memories and Thoughts Volume 2 (1998)
- Memories and Thoughts Volume 3 (2001)
- Congress Speeches (1998)
- Ideas and Actions Speeches on History, Science and Politics (1999)
- Science Talks (2001)
- Three Hundred Years of Delay Speeches on History, Culture, Science and Politics (2002)
- The Scientific Revolution and its Strategic Meaning (2003)
Known for his humorous and humble personality, İnönü did not hesitate to mingle with the public in his daily life. He does not like to be taken on the shoulders, he does not like to show off, he would prevent this by lying on his back with a movement called "İnönü lying" when he wanted to be taken on the shoulders. He didn't like smoking at all. From time to time he would come to Parliament on foot and without protection.