![r - How to make monotonic (increasing) smooth spline with smooth.spline() function? - Stack Overflow r - How to make monotonic (increasing) smooth spline with smooth.spline() function? - Stack Overflow](https://i.stack.imgur.com/csvGq.png)
r - How to make monotonic (increasing) smooth spline with smooth.spline() function? - Stack Overflow
![Risks | Free Full-Text | Model-Free Stochastic Collocation for an Arbitrage-Free Implied Volatility, Part II Risks | Free Full-Text | Model-Free Stochastic Collocation for an Arbitrage-Free Implied Volatility, Part II](https://www.mdpi.com/risks/risks-07-00030/article_deploy/html/images/risks-07-00030-g006.png)
Risks | Free Full-Text | Model-Free Stochastic Collocation for an Arbitrage-Free Implied Volatility, Part II
![Example of nasty curve taken from ref. [5] (p. 98 and fig. 2, bottom... | Download Scientific Diagram Example of nasty curve taken from ref. [5] (p. 98 and fig. 2, bottom... | Download Scientific Diagram](https://www.researchgate.net/profile/Ferdinando-Ametrano/publication/228267619/figure/fig2/AS:669492887711745@1536630951004/Example-of-nasty-curve-taken-from-ref-5-p-98-and-fig-2-bottom-right-panel-Upper_Q640.jpg)
Example of nasty curve taken from ref. [5] (p. 98 and fig. 2, bottom... | Download Scientific Diagram
![Example of nasty curve taken from ref. [5] (p. 98 and fig. 2, bottom... | Download Scientific Diagram Example of nasty curve taken from ref. [5] (p. 98 and fig. 2, bottom... | Download Scientific Diagram](https://www.researchgate.net/publication/228267619/figure/fig2/AS:669492887711745@1536630951004/Example-of-nasty-curve-taken-from-ref-5-p-98-and-fig-2-bottom-right-panel-Upper.png)
Example of nasty curve taken from ref. [5] (p. 98 and fig. 2, bottom... | Download Scientific Diagram
![Risks | Free Full-Text | Model-Free Stochastic Collocation for an Arbitrage-Free Implied Volatility, Part II Risks | Free Full-Text | Model-Free Stochastic Collocation for an Arbitrage-Free Implied Volatility, Part II](https://www.mdpi.com/risks/risks-07-00030/article_deploy/html/images/risks-07-00030-g001.png)
Risks | Free Full-Text | Model-Free Stochastic Collocation for an Arbitrage-Free Implied Volatility, Part II
![PDF) Spline interpolation for demographic variables: the monotonicity problem | Rob Hyndman - Academia.edu PDF) Spline interpolation for demographic variables: the monotonicity problem | Rob Hyndman - Academia.edu](https://0.academia-photos.com/attachment_thumbnails/30735023/mini_magick20190426-1114-1b0cvlr.png?1556320186)