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Seppo Linnainmaa was born on 28 September, 1945 in United States, is a Finnish mathematician and computer scientist. Discover Seppo Linnainmaa's Biography, Age, Height, Physical Stats, Dating/Affairs, Family and career updates. Learn How rich is he in this year and how he spends money? Also learn how he earned most of networth at the age of 78 years old?

Popular As N/A
Occupation N/A
Age 78 years old
Zodiac Sign Libra
Born 28 September, 1945
Birthday 28 September
Birthplace N/A
Nationality United States

We recommend you to check the complete list of Famous People born on 28 September. He is a member of famous mathematician with the age 78 years old group.

Seppo Linnainmaa Height, Weight & Measurements

At 78 years old, Seppo Linnainmaa height not available right now. We will update Seppo Linnainmaa's Height, weight, Body Measurements, Eye Color, Hair Color, Shoe & Dress size soon as possible.

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Dating & Relationship status

He is currently single. He is not dating anyone. We don't have much information about He's past relationship and any previous engaged. According to our Database, He has no children.

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Seppo Linnainmaa Net Worth

His net worth has been growing significantly in 2023-2024. So, how much is Seppo Linnainmaa worth at the age of 78 years old? Seppo Linnainmaa’s income source is mostly from being a successful mathematician. He is from United States. We have estimated Seppo Linnainmaa's net worth, money, salary, income, and assets.

Net Worth in 2024 $1 Million - $5 Million
Salary in 2024 Under Review
Net Worth in 2023 Pending
Salary in 2023 Under Review
House Not Available
Cars Not Available
Source of Income mathematician

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1945

Seppo Ilmari Linnainmaa (born 28 September 1945) is a Finnish mathematician and computer scientist known for creating the modern version of backpropagation.

He was born in Pori.

1970

Explicit, efficient error backpropagation in arbitrary, discrete, possibly sparsely connected, neural networks-like networks was first described in Linnainmaa's 1970 master's thesis, albeit without reference to NNs, when he introduced the reverse mode of automatic differentiation (AD), in order to efficiently compute the derivative of a differentiable composite function that can be represented as a graph, by recursively applying the chain rule to the building blocks of the function.

Linnainmaa published it first, following Gerardi Ostrowski who had used it in the context of certain process models in chemical engineering some five years earlier, but didn't publish.

With faster computers emerging, the method has become heavily used in numerous applications.

For example, backpropagation of errors in multi-layer perceptrons, a technique used in machine learning, is a special case of reverse mode AD.

1974

In 1974 he obtained the first doctorate ever awarded in computer science at the University of Helsinki.

1976

In 1976, he became Assistant Professor.

1984

From 1984 to 1985 he was Visiting Professor at the University of Maryland, USA.

1986

From 1986 to 1989 he was Chairman of the Finnish Artificial Intelligence Society.

1989

From 1989 to 2007, he was Research Professor at the VTT Technical Research Centre of Finland.

2007

He retired in 2007.

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