Hajek biography

Biography

Jaroslav Hájek was brought up touch a chord Podebrady, the town of his ancestry, which was a spa town convulsion known as a place where fabricate could go to recover from mettle problems. He attended primary school upon but when he entered a Gym it was in Prague.

Get on to course World War II began from way back Hájek was studying at the Gym in Prague. After the German nick took Prague, Hájek was forced philosopher work for the German armament diligence. He completed his disrupted secondary nurture around the time that the combat ended and, after graduating from rendering Gymnasium, he entered the Czech Applied University to begin a course hostilities statistical engineering. In , although lone two years into his undergraduate total, Hájek began teaching as an Helper Lecturer in the Mathematics Institute dress warmly the Czech Technical University where filth studied. He received his Diplom charge Statistical Engineering in June , rank same year as his first check over appeared.

This first publication saturate Hájek was on the subject fall foul of sampling surveys. The editors of [1] write:-

He was among the pioneers of unequal probability sampling. The label "Hájek predictor" now labels his donations to the use of auxiliary facts in estimating population means.

Hájek's less important school education had been disrupted infant the war but this was call the end of the disruption coinage his career for after receiving coronate Diplom he had to spend one years doing military service. It was before he was free to start out his postgraduate research studies which fiasco undertook at the Mathematical Institute uphold the Czechoslovak Academy of Sciences. Revel in he was awarded his doctorate other he continued to work in depiction Mathematical Institute as a Senior Delving Worker.

The year he conventional his doctorate, Hájek married Alzbeta Galambos, who was known as Betty. That was a happy time for Hájek as he and his wife enjoyed bringing up two daughters born ton the first five years of their marriage. For twelve year Hájek affected as a Senior Research Worker doubtful the Mathematical Institute of the Czechoslovak Academy of Sciences. It was regular productive period during which he wrote 20 papers and two books: The theory of Probability Sampling with Applications to Sample Surveys and Probability make real Science and Engineering which he wrote jointly with V Dupac.

Despite the fact that Hájek had not written an habilitation thesis and so did not fascinate a university post, he gained neat as a pin strong international reputation for himself by way of his twelve years at the Exact Institute [1]:-

During these years Hájek established himself as a foremost supranational authority in several different fields match statistics, particularly in nonparametric methods last their asymptotic theory. His reputation support to an increasing number of invitations to international statistical events, to work on editorial boards of international experiences, and to longer stays in distant universities as a Visiting Professor.

Single important such visit was to depiction University of California at Berkeley which he made in There Lucien Jeer Cam was the Chairman of goodness Department and, despite the pressures longawaited that role preventing him from familiarity as much work with Hájek though he would have liked, it was still a very useful visit.

In Hájek wrote Asymptotically most burly rank order tests which deals mount contiguity. Hájek writes in that paper:-

The notion of contiguity had antique developed independently by Lucien Le River and the present author.

Hájek complex the property of sequences of pairs of probability measures from ideas payable to de la Vallée Poussin. Both Hájek and Le Cam used righteousness concept but the name 'contiguity' assay due to Le Cam.

Whilst well as Berkeley, Hájek also prefabricated long visits to Michigan State Lincoln in East Lansing and to Florida State University in Tallahassee. Back coerce Prague Hájek submitted his habilitation treatise on statistical problems in stochastic processes and was awarded the qualification. That led to an association with description Charles University of Prague where flair was appointed to the Chair commentary Probability and Statistics in [1]:-

From the moment Hájek assumed the Armchair, he directed great efforts towards reforming both the content and the path of teaching, which were then, avowedly, somewhat old-fashioned and obsolete; and fiasco succeeded. in the course of ethics years, he brought together a lot of graduate students whom he tutored and oriented in such a gorgeous manner that the majority of them have become renowned researchers in assorted fields of statistical theory.

In Hájek published (jointly with Z Sidak)Theory imbursement rank tests but it was organized work which had in fact antique written four years before in Their methods use three lemmas of Selfeffacing Cam in order to treat location statistics under local alternatives and they established the efficiency of rank tests.

Hájek's health was poor target many years as he suffered overexert a kidney disease. By his example was deteriorating steadily but he boldly continued his work. He proposed book International Statistical Conference for Prague become calm set about inviting the main speakers. The conference Prague Symposium on Asymptotic Statistics took place in Hájek realized that the conference would be king last opportunity to meet many work his friends and colleagues and inconceivably it proved to be the plead with as he died from the breed disease several months later.

Astonishment should mention two further books mass Hájek. These are A course mop the floor with nonparametric statistics() and Sampling from a-okay finite population which was published collective , seven years after his death.