Editing Christian Doppler (section)

=== Early life and education ===
Doppler was born in [[Salzburg]] (today Austria) in 1803. Doppler was the second son of Johann Evangelist Doppler and Theresia Seeleuthner (Doppler). Doppler's father, Johann Doppler, was a third-generation stone mason in Salzburg.<ref name="AlecEden" /> As a young boy, Doppler showed promise for his family's trade.<ref name=":1">{{Cite book |last=Eden |first=Alec |url=https://www.worldcat.org/oclc/21739119 |title=Christian Doppler : thinker and benefactor |date=1988 |publisher=Christian Doppler Institute for Medical Science & Technology |others=Christian Doppler |isbn=3-900905-00-2 |location=Salzburg, Austria |pages=34 |oclc=21739119}}</ref> However, due to his weak health, Doppler's father encouraged him instead to pursue a career in business. Doppler started elementary education at the age of 13.<ref name=":2">{{cite journal | doi=10.1016/j.euje.2004.06.004 | title=Christian Andreas Doppler ? The man and his legacy | year=2005 | last1=Coman | first1=I. | journal=European Journal of Echocardiography | volume=6 | issue=1 | pages=7–10 | pmid=15744940 | doi-access=free }}</ref> After completion, he moved on to secondary education at a school in Linz.<ref name=":2" /> Doppler's proficiency in mathematics was discovered by Simon Stampfer, a mathematician in Salzburg. Upon his recommendation, Doppler took a break from high school to attend the Polytechnic Institute in Vienna in 1822.<ref name=":1" /> Doppler returned to Salzburg in 1825 to finish his secondary education.<ref name="AlecEden" /> After completing high school, Doppler studied philosophy in Salzburg and mathematics and physics at the [[University of Vienna]] and Imperial–Royal Polytechnic Institute (now [[TU Wien]]). In 1829, he was chosen for an assistant position to Professor Adam Von Burg at the Polytechnic Institute of Vienna, where he continued his studies.<ref>{{Cite web |title=Christian Doppler - Biography |url=https://mathshistory.st-andrews.ac.uk/Biographies/Doppler/ |access-date=14 February 2023 |website=Maths History |language=en}}</ref>

In 1835, he decided to immigrate to the United States to pursue a position in academia.<ref name=":0" /> Before departing for the United States, Doppler was offered a teaching position at a state-operated high school in Prague, which convinced him to stay in Europe.<ref name=":0">{{Cite book |last=Publishing |first=Helicon |title=Hutchinson Dictionary of Scientific Biography |publisher=Helicon Publishing |year=2005 |isbn=1-280-73192-3 |pages=2899}}</ref> Shortly after, in 1837 he was appointed as an associate professor of math and geometry at the Prague Polytechnic Institute (now [[Czech Technical University in Prague]]). He received a full professorship position in 1841.<ref name="AlecEden" />