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| // __    | / \ ||  |  ' ||  | ||__    |    \\  
| \\_\ ||  | \_/ ||  | .  ||  | ||__    | [] ||  
 \____//    \___//   |_|\_||  |_____||  |  __//  
  `---`     `---`    `-` -`   `-----`   |_|`-`   
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Text this: Non-monotonic dependence of the friction coefficient on heterogeneous stiffness