Viggo Brun (13 October 1885 – 15 August 1978) was a Norwegian professor,mathematician and number theorist.
#ریاضیدانان_نامی
#ریاضیدانان_نامی
Brun was born at Lier in Buskerud, Norway. He studied at the University of Oslo and began research at the University of Göttingen in 1910. In 1923, Brun became a professor at theTechnical University in Trondheim and in 1946 a professor at the University of Oslo.
In 1915, he introduced a new method, based on Legendre's version of the sieve of Eratosthenes, now known as the Brun sieve, which addresses additive problems such asGoldbach's conjecture and the twin prime conjecture. He used it to prove that there exist infinitely many integers n such that n and n+2 have at most nine prime factors, and that all large even integers are the sum of two numbers with at most nine prime factors.
He also showed that the sum of the reciprocals of twin primes converges to a finite value, now called Brun's constant: by contrast, the sum of the reciprocals of all primes is divergent. He developed a multi-dimensional continued fraction algorithm in 1919–1920 and applied this to problems inmusical theory. He also served as praeses of the Royal Norwegian Society of Sciences and Letters in 1946.
He retired in 1955 at the age of 70 and died in 1978 at Drobak in Akershus, Norway.
#ریاضیدانان_نامی
In 1915, he introduced a new method, based on Legendre's version of the sieve of Eratosthenes, now known as the Brun sieve, which addresses additive problems such asGoldbach's conjecture and the twin prime conjecture. He used it to prove that there exist infinitely many integers n such that n and n+2 have at most nine prime factors, and that all large even integers are the sum of two numbers with at most nine prime factors.
He also showed that the sum of the reciprocals of twin primes converges to a finite value, now called Brun's constant: by contrast, the sum of the reciprocals of all primes is divergent. He developed a multi-dimensional continued fraction algorithm in 1919–1920 and applied this to problems inmusical theory. He also served as praeses of the Royal Norwegian Society of Sciences and Letters in 1946.
He retired in 1955 at the age of 70 and died in 1978 at Drobak in Akershus, Norway.
#ریاضیدانان_نامی
دوستان عزیز در معرفی هرچه بیشتر و بهتر ریاضیدانان ایرانی به ما کمک کنید.
ارتباط با مدیر کانال
@meisami_mah
ارتباط با مدیر کانال
@meisami_mah
با توجه به این که اهداف این کانال صرفا ترویج ریاضی و آگاهی پیدا کردن از اخبار جهان ریاضیات و دسترسی به منابع و کتاب های روز ریاضی است، از شما خواهشمندیم با ارسال مطالب مفیدتان به ما و همچنین انتشار نشانی کانال برای دوستانتان در هرچه پر رونق تر کردن این فعالیت سهیم باشید
آی دی کانال
@harmoniclib
آی دی مدیر کانال
@meisami_mah
آی دی کانال
@harmoniclib
آی دی مدیر کانال
@meisami_mah
در این کتاب به هندسه اقلیدسی
منطق و هندسه وقوع
بنداشتهای هیلبرت
هندسه نتاری
تاریخچه اصل توازی
کشف هندسه نااقلیدسی
استقلال اصل توازی
و.....
پرداخته شده است.
@harmoniclib
#معرفی_کتاب
منطق و هندسه وقوع
بنداشتهای هیلبرت
هندسه نتاری
تاریخچه اصل توازی
کشف هندسه نااقلیدسی
استقلال اصل توازی
و.....
پرداخته شده است.
@harmoniclib
#معرفی_کتاب
در این کتاب به موضوعاتی چون
هندسه اقلیدسی در تقابل با هندسه هذلولوی
هندسه بیضوی
هندسه دیفرانسیل و خمیدگی گاوسی
الگوی بلتزامی کلاین
هندسه نااقلیدسی
و...
پرداخته شده.
@harmoniclib
#معرفی_کتاب
هندسه اقلیدسی در تقابل با هندسه هذلولوی
هندسه بیضوی
هندسه دیفرانسیل و خمیدگی گاوسی
الگوی بلتزامی کلاین
هندسه نااقلیدسی
و...
پرداخته شده.
@harmoniclib
#معرفی_کتاب
منصور معتمدی
تولد: 1325
درگذشت: 1394/03/21 / اصفهان
مدارک دانشگاهی:
-- دكترا ریاضی جبر شركت پذیر از دانشگاه شهید چمران اهواز(1373)
-- كارشناسی ارشد ریاضی جبر از دانشگاه شیراز (1352)
-- كارشناسی ریاضی محض از دانشگاه اصفهان(1348)
#معرفی_اساتید
تولد: 1325
درگذشت: 1394/03/21 / اصفهان
مدارک دانشگاهی:
-- دكترا ریاضی جبر شركت پذیر از دانشگاه شهید چمران اهواز(1373)
-- كارشناسی ارشد ریاضی جبر از دانشگاه شیراز (1352)
-- كارشناسی ریاضی محض از دانشگاه اصفهان(1348)
#معرفی_اساتید
یک چند به کودکی به استاد شدیم
یک چند به استادی خود شاد شدیم
پایان سخن شنو که مارا چه رسید
از خاک بر آمدیم و در باد شدیم
یک چند به استادی خود شاد شدیم
پایان سخن شنو که مارا چه رسید
از خاک بر آمدیم و در باد شدیم
امشب به یکباره در این وقت سحر ماه رمضان به یاد این استاد بزرگوار خود یعنی دکتر معتمدی افتادم و چه جالب که نمی دانستم هفته آینده دومین سالگرد وفات ایشان است...
خیلی چیزها از او آموختم
بزرگترین شانس ما آمدنش بعد از بازنشستگی به اصفهان بود
در سه دوره کلاس های ایشان در خانه ریاضیات اصفهان شرکت کردم
دوره اول به ما جبر خطی را درس داد
به شکلی جبر خطی را درس می داد که هیچ کس چون او بر این امر توانا نبود.
علاقه فراوانی به گراسمان داشت و او را شخص اول جبر خطی می دانست.
او از معدود افرادی بود که جبرخطی را شهودی درس می داد.
دوره دوم کلاس او نظریه لتیس بود، که اهل فن می دانند جزو مجردترین شاخه های ریاضی است ولی او به شیرین ترین شکل آن را تدریس می کرد.
دید لتیس به ما داد به شکلی که بعد ها در آنالیز تابعی هم این دید به درد من خورد.
دوره سوم هندسه مسطحه بود با دیدگاه مکانیک. مسایل را به گونه ای مطرح می کرد که انگار خودش در دنیای فیزیک مکانیک با آن برخورد داشته و حالا آنها را مدلسازی کرده و به دنیای هندسه آورده است.
روزهایی که کلاس نداشت هم به کتابخانه خانه ریاضیات می آمد و مانند یک دانش آموز مشغول مطالعه می شد.
تفکرش بسیار عمیق بود و همه تجربیاتش را در اختیار دیگران می گذاشت.
هرگز ندیدم صدایش بلند شود یا بر کسی اخمی کند.
حیف و صد حیف که اورا از دست دادیم.
نبودش صدمه ای جبران ناپذیر بر ریاضیات ایران است.
روحش شاد و یادش گرامی و راهش پر رهرو.
#معرفی_اساتید
@harmoniclib
خیلی چیزها از او آموختم
بزرگترین شانس ما آمدنش بعد از بازنشستگی به اصفهان بود
در سه دوره کلاس های ایشان در خانه ریاضیات اصفهان شرکت کردم
دوره اول به ما جبر خطی را درس داد
به شکلی جبر خطی را درس می داد که هیچ کس چون او بر این امر توانا نبود.
علاقه فراوانی به گراسمان داشت و او را شخص اول جبر خطی می دانست.
او از معدود افرادی بود که جبرخطی را شهودی درس می داد.
دوره دوم کلاس او نظریه لتیس بود، که اهل فن می دانند جزو مجردترین شاخه های ریاضی است ولی او به شیرین ترین شکل آن را تدریس می کرد.
دید لتیس به ما داد به شکلی که بعد ها در آنالیز تابعی هم این دید به درد من خورد.
دوره سوم هندسه مسطحه بود با دیدگاه مکانیک. مسایل را به گونه ای مطرح می کرد که انگار خودش در دنیای فیزیک مکانیک با آن برخورد داشته و حالا آنها را مدلسازی کرده و به دنیای هندسه آورده است.
روزهایی که کلاس نداشت هم به کتابخانه خانه ریاضیات می آمد و مانند یک دانش آموز مشغول مطالعه می شد.
تفکرش بسیار عمیق بود و همه تجربیاتش را در اختیار دیگران می گذاشت.
هرگز ندیدم صدایش بلند شود یا بر کسی اخمی کند.
حیف و صد حیف که اورا از دست دادیم.
نبودش صدمه ای جبران ناپذیر بر ریاضیات ایران است.
روحش شاد و یادش گرامی و راهش پر رهرو.
#معرفی_اساتید
@harmoniclib
Alfred Goldie
Members will be very sorry to learn of the death, on 8 October 2005, of Emeritus Professor Alfred Goldie.
Born in 1920, Professor Goldie attended Wolverhampton Grammar School before being awarded a State Scholarship and an Open Major Scholarship at St Johns College, Cambridge, to read Mathematics. He was awarded a First in Part II of the Mathematical Tripos in 1941, then leaving Cambridge for war work on the staff of the Armament Research Department, Ministry of Supply. He received his BA degree from Cambridge in 1942, and proceeded to the MA in 1946. In the latter year, Professor Goldie entered academic life as an assistant lecturer at the University of Nottingham. He took up a lectureship in Pure Mathematics at Kings College, Newcastle, in 1948, becoming Senior Lecturer in 1958 and Reader in Algebra in 1960.
In 1963, Professor Goldie was appointed to the second Chair in Pure Mathematics at Leeds, with a specific brief to foster research and postgraduate teaching. By the time of his arrival in Leeds, he was already an established mathematician, with an international reputation as an algebraist, particularly in the theory of rings. His early research had been concerned with a study of general algebraic systems, and had led to a number of papers. However, in the early 1950s, his interests switched to ring theory and the new ideas that had recently been introduced by the then leading authority in this field, Professor Nathan Jacobson of Yale University. Professor Goldie initially collaborated with his colleague at Newcastle, Professor F F Bonsall, in the successful application of Professor Jacobsons work to the study of Banach algebras, their paper Annihilator Algebras, published in 1954 in The Proceedings of the London Mathematical Society, producing considerable interest. Professor Goldie went on to produce seminal papers on the theory of non-commutative rings, his discoveries being widely hailed as a very considerable advance and leading to an invitation from Professor Jacobson to spend the year 1960-61 at Yale. Goldies Theorem was to provide the cornerstone of a whole body of future research; substantial applications of the theorem were made by Professor Goldie and his students, whilst many doctoral theses and publications by researchers in other parts of the world had their origins in his work.
With Professor Goldies example and guidance, the Department of Pure Mathematics at Leeds achieved a very considerable reputation nationally and internationally for the quality and calibre of its research. A most successful Head of Department from 1970 to 1972, and Chairman of the School of Mathematics from 1976 to 1979, Professor Goldie also held a number of visiting appointments in the USA, Canada and other European countries. He was a strong believer in the stimulus of international collaboration and he and his colleagues in the Department, including John McConnell, Christopher Robson and Toby Stafford (the first two of whom had been his research students), enjoyed fruitful interactions with a series of distinguished academic visitors to Leeds. Professor Goldie was awarded the prestigious Senior Berwick Prize of the London Mathematical Society, the major British learned society for Mathematics, in 1970, and served on the Council of the Society, being made its Vice-President for the period from 1978 to 1980. A man of vivid personality and strong opinions, he was a tireless advocate of the need for proper resources to sustain the international quality of mathematics and the other sciences in this country.
Professor Goldie retired from his Chair in September 1986, when the title of Emeritus Professor was conferred upon him by the University. His retirement was also marked by an international symposium in Leeds. In the words of the Senate resolution adopted on his retirement at this symposium the extent of his fame, and the affection and admiration felt for him, were movingly demonstrated by over one hundred participants from around the world. The fact that the symposium, focused on his research achievements, w
Members will be very sorry to learn of the death, on 8 October 2005, of Emeritus Professor Alfred Goldie.
Born in 1920, Professor Goldie attended Wolverhampton Grammar School before being awarded a State Scholarship and an Open Major Scholarship at St Johns College, Cambridge, to read Mathematics. He was awarded a First in Part II of the Mathematical Tripos in 1941, then leaving Cambridge for war work on the staff of the Armament Research Department, Ministry of Supply. He received his BA degree from Cambridge in 1942, and proceeded to the MA in 1946. In the latter year, Professor Goldie entered academic life as an assistant lecturer at the University of Nottingham. He took up a lectureship in Pure Mathematics at Kings College, Newcastle, in 1948, becoming Senior Lecturer in 1958 and Reader in Algebra in 1960.
In 1963, Professor Goldie was appointed to the second Chair in Pure Mathematics at Leeds, with a specific brief to foster research and postgraduate teaching. By the time of his arrival in Leeds, he was already an established mathematician, with an international reputation as an algebraist, particularly in the theory of rings. His early research had been concerned with a study of general algebraic systems, and had led to a number of papers. However, in the early 1950s, his interests switched to ring theory and the new ideas that had recently been introduced by the then leading authority in this field, Professor Nathan Jacobson of Yale University. Professor Goldie initially collaborated with his colleague at Newcastle, Professor F F Bonsall, in the successful application of Professor Jacobsons work to the study of Banach algebras, their paper Annihilator Algebras, published in 1954 in The Proceedings of the London Mathematical Society, producing considerable interest. Professor Goldie went on to produce seminal papers on the theory of non-commutative rings, his discoveries being widely hailed as a very considerable advance and leading to an invitation from Professor Jacobson to spend the year 1960-61 at Yale. Goldies Theorem was to provide the cornerstone of a whole body of future research; substantial applications of the theorem were made by Professor Goldie and his students, whilst many doctoral theses and publications by researchers in other parts of the world had their origins in his work.
With Professor Goldies example and guidance, the Department of Pure Mathematics at Leeds achieved a very considerable reputation nationally and internationally for the quality and calibre of its research. A most successful Head of Department from 1970 to 1972, and Chairman of the School of Mathematics from 1976 to 1979, Professor Goldie also held a number of visiting appointments in the USA, Canada and other European countries. He was a strong believer in the stimulus of international collaboration and he and his colleagues in the Department, including John McConnell, Christopher Robson and Toby Stafford (the first two of whom had been his research students), enjoyed fruitful interactions with a series of distinguished academic visitors to Leeds. Professor Goldie was awarded the prestigious Senior Berwick Prize of the London Mathematical Society, the major British learned society for Mathematics, in 1970, and served on the Council of the Society, being made its Vice-President for the period from 1978 to 1980. A man of vivid personality and strong opinions, he was a tireless advocate of the need for proper resources to sustain the international quality of mathematics and the other sciences in this country.
Professor Goldie retired from his Chair in September 1986, when the title of Emeritus Professor was conferred upon him by the University. His retirement was also marked by an international symposium in Leeds. In the words of the Senate resolution adopted on his retirement at this symposium the extent of his fame, and the affection and admiration felt for him, were movingly demonstrated by over one hundred participants from around the world. The fact that the symposium, focused on his research achievements, w
as followed by a research conference with no significant discontinuity, demonstrated the continuing influence of his work. Professor Goldie remained active in his subject after retirement, including serving as one of the editors of the Journal of Algebra.
Professor Goldie is survived by his second wife, Margaret, and a son, John, and two daughters, Isobel and Helen.
Professor Goldie is survived by his second wife, Margaret, and a son, John, and two daughters, Isobel and Helen.
دکتر مجید میرزاوزیری
استاد دانشگاه فردوسی مشهد
تخصص آنالیز تابعی
ایشان در زمینه ترویج ریاضی فعالیت های زیادی داشته و کتاب های بسیاری نوشته اند.
#معرفی_اساتید
@harmoniclib
استاد دانشگاه فردوسی مشهد
تخصص آنالیز تابعی
ایشان در زمینه ترویج ریاضی فعالیت های زیادی داشته و کتاب های بسیاری نوشته اند.
#معرفی_اساتید
@harmoniclib
👍1
تعدادی از کتاب های دکتر میرزاوزیری:
فضاهای متریک با طعم توپولوژی،
آنالیز ریاضی: درس، مسئله،
یادگیری ریاضیات به عنوان زبان دوم،
یادگیری ریاضی ازطریق معما و بازی،
مثلث،
اشتباه سوزنبان،
سیصد و یازده،
داو دوم/ حکایتی از زمان دو بعدی،
روزی که صداها را دیدم،
قلب درنگاه،
حافظه استاد،
قتل در فانوس دریایی،
کهکشان ستاره‌های دریایی،
عقربه ثانیه شمار،
بازگشت به منزل آخر و منطق،
مجموعه ها و اعداد
#معرفی_اساتید
فضاهای متریک با طعم توپولوژی،
آنالیز ریاضی: درس، مسئله،
یادگیری ریاضیات به عنوان زبان دوم،
یادگیری ریاضی ازطریق معما و بازی،
مثلث،
اشتباه سوزنبان،
سیصد و یازده،
داو دوم/ حکایتی از زمان دو بعدی،
روزی که صداها را دیدم،
قلب درنگاه،
حافظه استاد،
قتل در فانوس دریایی،
کهکشان ستاره‌های دریایی،
عقربه ثانیه شمار،
بازگشت به منزل آخر و منطق،
مجموعه ها و اعداد
#معرفی_اساتید